BAI TAP 1
Trn Thi Thu Trang
BAI TAP 1
Hap thu 30.49 lt kh CO2 o ktc vao 2073.156 gam dung dch KOH 13.56 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)
BAI GIAI
So mol CO2 = 30.49/22.4 = 1.361(mol)So mol KOH =2073.156x13.56 /( 56 x 100 ) = 5.02(mol)So mol KOH/So mol CO2 = 3.688 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 1.361(mol)Khoi lng muoi K2CO3 = 1.361x138 = 187.818(gam)
BAI TAP 2
Hap thu 12.947 lt kh CO2 o dktc vao 358.187 gam dung dch NaOH 26.69 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 12.947/22.4 = 0.578(mol)So mol NaOH =358.187x26.69 /( 40 x 100 ) = 2.39(mol)So mol NaOH/So mol CO2 = 4.135 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.578(mol)Khoi lng muoi Na2CO3 = 0.578x106 = 61.268(gam)
BAI TAP 3
Hap thu 38.528 lt kh SO2 o dktc vao 2832 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 38.528/22.4 = 1.72(mol)So mol NaOH =2832x10 /( 40 x 100 ) = 7.08(mol)So mol NaOH/So mol SO2 = 4.116 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 1.72(mol)Khoi lng muoi Na2SO3 = 1.72x126 = 216.72(gam)
BAI TAP 4
Hap thu 41.238 lt kh CO2 o dktc vao 1471.092 gam dung dch NaOH 18.68 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 41.238/22.4 = 1.841(mol)So mol NaOH =1471.092x18.68 /( 40 x 100 ) = 6.87(mol)So mol NaOH/So mol CO2 = 3.732 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.841(mol)Khoi lng muoi Na2CO3 = 1.841x106 = 195.146(gam)
BAI TAP 5
Hap thu V lt kh SO2 o dktc vao 0.15 lt dung dch NaOH 5.19 M thu c 79.338 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.15 x 5.19 = 0.781Khoi lng hon hp 2 muoi : 104x + 126y = 79.338Giai ra ta c : x = 0.735(mol) , y = 0.023(mol)Khoi lng cua muoi NaHSO3 = 0.735 x 104 = 76.44 (gam)Khoi lng cua muoi Na2SO3 = 0.023x126 = 2.898 (gam)
BAI TAP 6
Hap thu V lt kh CO2 o dktc vao 2.967 lt dung dch NaOH 0.89 M thu c 140.376 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 2.967 x 0.89 = 2.641Khoi lng hon hp 2 muoi : 84x + 106y = 140.376Giai ra ta c : x = 0.01(mol) , y = 1.314(mol)Khoi lng cua muoi NaHCO3 = 0.01 x 84 = 1.092 (gam)Khoi lng cua muoi Na2CO3 = 1.314x106 = 139.284 (gam)
BAI TAP 7
Hap thu 29.434 lt kh CO2 o dktc vao 364.728 gam dung dch NaOH 36.63 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 29.434/22.4 = 1.314(mol)So mol NaOH =364.728x36.63 /( 40 x 100 ) = 3.34(mol)So mol NaOH/So mol CO2 = 2.542 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.314(mol)Khoi lng muoi Na2CO3 = 1.314x106 = 139.284(gam)
BAI TAP 8
Cho m gam P2O5 tac dung vi 1.34 lt dung dch NaOH 2.57 M thu c 241.104 gam 2 muoi Na2HPO4 va Na3PO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua Na2HPO4 , y la so mol cua Na3PO4P2O5 + 4NaOH = 2Na2HPO4 + H2O (1)0.5x2x xP2O5 + 6NaOH = 2Na3PO4 + 3H2O (2)0.5y 3y yTa co : So mol NaOH : x + 2y = 1.34 x 2.57 = 3.44Khoi lng hon hp 2 muoi : 142x + 164y = 241.104Giai ra ta c : x = 1.624(mol) , y = 0.064(mol)Khoi lng cua muoi Na2HPO4 = 1.624 x 142 = 230.608 (gam)Khoi lng cua muoi Na3PO4 = 0.064x164 = 10.496 (gam)
BAI TAP 9
Hap thu V lt kh CO2 o dktc vao 0.285 lt dung dch KOH 4.65 M thu c 105.196 gam 2 muoi KHCO3 va K2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;K=39;H=1)
BAI GIAI
Goi x la so mol cua KHCO3 , y la so mol cua K2CO3KOH + CO2 = KHCO3 (1)x xx2KOH + CO2 = K2CO3 + H2O (2)2yy yTa co : So mol KOH : x + 2y = 0.285 x 4.65 = 1.326Khoi lng hon hp 2 muoi : 100x + 138y = 105.196Giai ra ta c : x = 0.442(mol) , y = 0.442(mol)Khoi lng cua muoi KHCO3 = 0.442 x 100 = 44.2 (gam)Khoi lng cua muoi K2CO3 = 0.442x138 = 60.996 (gam)
BAI TAP 10
Hap thu 26.074 lt kh SO2 o dktc vao 960 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 26.074/22.4 = 1.164(mol)So mol NaOH =960x10 /( 40 x 100 ) = 2.4(mol)So mol NaOH/So mol SO2 = 2.062 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 1.164(mol)Khoi lng muoi Na2SO3 = 1.164x126 = 146.664(gam)
BAI TAP 11
Hap thu 38.909 lt kh CO2 o dktc vao 3.004 lt dung dch NaOH 2.3 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 38.909/22.4 = 1.737(mol)So mol NaOH =3.004x2.3 = 6.91(mol)So mol NaOH/So mol CO2 = 3.978 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.737(mol)Khoi lng muoi Na2CO3 = 1.737x106 = 184.122(gam)
BAI TAP 12
Hap thu V lt kh CO2 o dktc vao 0.314 lt dung dch NaOH 3.36 M thu c 66.796 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.314 x 3.36 = 1.055Khoi lng hon hp 2 muoi : 84x + 106y = 66.796Giai ra ta c : x = 0.35(mol) , y = 0.352(mol)Khoi lng cua muoi NaHCO3 = 0.35 x 84 = 29.484 (gam)Khoi lng cua muoi Na2CO3 = 0.352x106 = 37.312 (gam)
BAI TAP 13
Hap thu 36.669 lt kh CO2 o dktc vao 409.923 gam dung dch NaOH 24.59 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 36.669/22.4 = 1.637(mol)So mol NaOH =409.923x24.59 /( 40 x 100 ) = 2.52(mol)1 < So mol NaOH/So mol CO2 = 1.539 < 2 => Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.637So mol NaOH : 2x + y = 2.52Giai ra ta c : x= 0.754 (mol) , y = 0.883 (mol)Khoi lng muoi NaHCO3 = 0.754x84 = 63.336(gam)Khoi lng muoi Na2CO3 = 0.883x106 = 93.598(gam)
BAI TAP 14
Hap thu 36.624 lt kh CO2 o dktc vao 2.264 lt dung dch NaOH 3.37 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 36.624/22.4 = 1.635(mol)So mol NaOH =2.264x3.37 = 7.63(mol)So mol NaOH/So mol CO2 = 4.667 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.635(mol)Khoi lng muoi Na2CO3 = 1.635x106 = 173.31(gam)
BAI TAP 15
Hap thu 44.419 lt kh SO2 o ktc vao 1.258 lt dung dch KOH 5.31 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)
BAI GIAI
So mol SO2 = 44.419/22.4 = 1.983(mol)So mol KOH =1.258x5.31 = 6.68(mol)So mol KOH/So mol SO2 = 3.369 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 1.983(mol)Khoi lng muoi K2SO3 = 1.983x158 = 313.314(gam)
BAI TAP 16
Hap thu 43.93 lt kh CO2 o dktc vao 1.778 lt dung dch KOH 4.28 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)
BAI GIAI
So mol CO2 = 43.93/22.4 = 1.961(mol)So mol KOH =1.778x4.28 = 7.61(mol)So mol KOH/So mol CO2 = 3.881 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 1.961(mol)Khoi lng muoi K2CO3 = 1.961x138 = 270.618(gam)
BAI TAP 17
Hap thu 36.019 lt kh CO2 o dktc vao 882.482 gam dung dch NaOH 31.91 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 36.019/22.4 = 1.608(mol)So mol NaOH =882.482x31.91 /( 40 x 100 ) = 7.04(mol)So mol NaOH/So mol CO2 = 4.378 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.608(mol)Khoi lng muoi Na2CO3 = 1.608x106 = 170.448(gam)
BAI TAP 18
Hap thu V lt kh SO2 o dktc vao 0.088 lt dung dch NaOH 3.65 M thu c 27.606 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.088 x 3.65 = 0.323Khoi lng hon hp 2 muoi : 104x + 126y = 27.606Giai ra ta c : x = 0.177(mol) , y = 0.073(mol)Khoi lng cua muoi NaHSO3 = 0.177 x 104 = 18.408 (gam)Khoi lng cua muoi Na2SO3 = 0.073x126 = 9.198 (gam)
BAI TAP 19
Hap thu 6.88 lt kh CO2 o dktc vao 2.052 lt dung dch KOH 1.16 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)
BAI GIAI
So mol CO2 = 6.88/22.4 = 0.307(mol)So mol KOH =2.052x1.16 = 2.38(mol)So mol KOH/So mol CO2 = 7.752 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 0.307(mol)Khoi lng muoi K2CO3 = 0.307x138 = 42.366(gam)
BAI TAP 20
Hap thu V lt kh CO2 o dktc vao 0.062 lt dung dch NaOH 2.42 M thu c 9.5 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.062 x 2.42 = 0.15Khoi lng hon hp 2 muoi : 84x + 106y = 9.5Giai ra ta c : x = 0.05(mol) , y = 0.05(mol)Khoi lng cua muoi NaHCO3 = 0.05 x 84 = 4.2 (gam)Khoi lng cua muoi Na2CO3 = 0.05x106 = 5.3 (gam)
BAI TAP 21
Hap thu 18.144 lt kh SO2 o dktc vao dung dch NaOH thu c 93.15 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol SO2 : x + y = 18.144 /22.4 = 0.81Khoi lng hon hp 2 muoi : 104x + 126y = 93.15Giai ra ta c : x = 0.405(mol) , y = 0.405(mol)Khoi lng cua muoi NaHSO3 = 0.405 x 104 = 42.12 (gam)Khoi lng cua muoi Na2SO3 = 0.405x126 = 51.03 (gam)
BAI TAP 22
Hap thu 5.6 lt kh SO2 o ktc vao 2.758 lt dung dch NaOH 2.27 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 5.6/22.4 = 0.25(mol)So mol NaOH =2.758x2.27 = 6.26(mol)So mol NaOH/So mol SO2 = 25.04 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.25(mol)Khoi lng muoi Na2SO3 = 0.25x126 = 31.5(gam)
BAI TAP 23
Hap thu V lt kh SO2 o dktc vao 1.776 lt dung dch NaOH 2.03 M thu c 230.212 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 1.776 x 2.03 = 3.606Khoi lng hon hp 2 muoi : 104x + 126y = 230.212Giai ra ta c : x = 0.074(mol) , y = 1.766(mol)Khoi lng cua muoi NaHSO3 = 0.074 x 104 = 7.696 (gam)Khoi lng cua muoi Na2SO3 = 1.766x126 = 222.516 (gam)
BAI TAP 24
Hap thu 36.422 lt kh SO2 o ktc vao 2.583 lt dung dch NaOH 2.28 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 36.422/22.4 = 1.626(mol)So mol NaOH =2.583x2.28 = 5.89(mol)So mol NaOH/So mol SO2 = 3.622 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 1.626(mol)Khoi lng muoi Na2SO3 = 1.626x126 = 204.876(gam)
BAI TAP 25
Hap thu 21.638 lt kh SO2 o ktc vao 1.842 lt dung dch KOH 3.16 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)
BAI GIAI
So mol SO2 = 21.638/22.4 = 0.966(mol)So mol KOH =1.842x3.16 = 5.82(mol)So mol KOH/So mol SO2 = 6.025 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 0.966(mol)Khoi lng muoi K2SO3 = 0.966x158 = 152.628(gam)
BAI TAP 26
Hap thu 30.374 lt kh CO2 o dktc vao 1.543 lt dung dch NaOH 0.81 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 30.374/22.4 = 1.356(mol)So mol NaOH =1.543x0.81 = 1.25(mol)0 < So mol NaOH/So mol CO2 = 0.922 Co 1 muoi sinh ra la : NaHCO3NaOH + CO2 = NaHCO3Ta co : So mol NaHCO3 = so mol NaOH = 1.25(mol)Khoi lng muoi NaHCO3 = 1.25x84 = 105(g)
BAI TAP 27
Hap thu 5.152 lt kh SO2 o ktc vao 11.964 lt dung dch NaOH 0.56 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 5.152/22.4 = 0.23(mol)So mol NaOH =11.964x0.56 = 6.7(mol)So mol NaOH/So mol SO2 = 29.13 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.23(mol)Khoi lng muoi Na2SO3 = 0.23x126 = 28.98(gam)
BAI TAP 28
Cho 124.96 gam P2O5 tac dung vi 1.701 lt dung dch NaOH 3.54 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)
BAI GIAI
So mol P2O5 = 124.96/142 = 0.88(mol)So mol NaOH =1.701x3.54 = 6.02(mol)So mol NaOH/So mol P2O5 = 6.841 > = 6 => Co 1 muoi sinh ra la : Na3PO4P2O5 + 6NaOH = 2Na3PO4 + 3H2OTa co : So mol Na3PO4 = 2 x so mol P2O5 = 2 x 0.88 = 1.76(mol)Khoi lng muoi Na3PO4 = 1.76x164 = 288.64(gam)
BAI TAP 29
Hap thu V lt kh SO2 o dktc vao 1.326 lt dung dch NaOH 1.4 M thu c 165.658 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 1.326 x 1.4 = 1.857Khoi lng hon hp 2 muoi : 104x + 126y = 165.658Giai ra ta c : x = 1.187(mol) , y = 0.335(mol)Khoi lng cua muoi NaHSO3 = 1.187 x 104 = 123.448 (gam)Khoi lng cua muoi Na2SO3 = 0.335x126 = 42.21 (gam)
BAI TAP 30
Hap thu 34.003 lt kh CO2 o dktc vao 2.178 lt dung dch NaOH 1.91 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 34.003/22.4 = 1.518(mol)So mol NaOH =2.178x1.91 = 4.16(mol)So mol NaOH/So mol CO2 = 2.74 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.518(mol)Khoi lng muoi Na2CO3 = 1.518x106 = 160.908(gam)
BAI TAP 31
Cho 266.25 gam P2O5 tac dung vi 688 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)
BAI GIAI
So mol P2O5 = 266.25/142 = 1.875(mol)So mol NaOH =688x10 /( 40 x 100 ) = 1.72(mol)0 = < So mol NaOH/So mol P2O5 = 0.917 Co 1 muoi sinh ra la : NaH2PO4P2O5 + 2NaOH +H2O = 2NaH2PO4Ta co : So mol NaH2PO4 = so mol NaOH = 1.72(mol)Khoi lng muoi NaH2PO4 = 1.72x120 = 206.4(gam)
BAI TAP 32
Hap thu 5.6 lt kh CO2 o dktc vao dung dch KOH thu c 29.75 gam 2 muoi KHCO3 va K2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;K=39;H=1)
BAI GIAI
Goi x la so mol cua KHCO3 , y la so mol cua K2CO3KOH + CO2 = KHCO3 (1)x xx2KOH + CO2 = K2CO3 + H2O (2)2yy yTa co : So mol CO2 : x + y = 5.6 /22.4 = 0.25Khoi lng hon hp 2 muoi : 100x + 138y = 29.75Giai ra ta c : x = 0.125(mol) , y = 0.125(mol)Khoi lng cua muoi KHCO3 = 0.125 x 100 = 12.5 (gam)Khoi lng cua muoi K2CO3 = 0.125x138 = 17.25 (gam)
BAI TAP 33
Hap thu 31.718 lt kh CO2 o dktc vao 1922.623 gam dung dch NaOH 15.25 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 31.718/22.4 = 1.416(mol)So mol NaOH =1922.623x15.25 /( 40 x 100 ) = 7.33(mol)So mol NaOH/So mol CO2 = 5.177 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.416(mol)Khoi lng muoi Na2CO3 = 1.416x106 = 150.096(gam)
BAI TAP 34
Cho 130.214 gam P2O5 tac dung vi 2680 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)
BAI GIAI
So mol P2O5 = 130.214/142 = 0.917(mol)So mol NaOH =2680x10 = 6.7(mol)So mol NaOH/So mol P2O5 = 7.306 > = 6 => Co 1 muoi sinh ra la : Na3PO4P2O5 + 6NaOH = 2Na3PO4 + 3H2OTa co : So mol Na3PO4 = 2 x so mol P2O5 = 2 x 0.917 = 1.83(mol)Khoi lng muoi Na3PO4 = 1.83x164 = 300.78(gam)
BAI TAP 35
Hap thu V lt kh CO2 o dktc vao 1.199 lt dung dch NaOH 2.12 M thu c 160.93 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 1.199 x 2.12 = 2.541Khoi lng hon hp 2 muoi : 84x + 106y = 160.93Giai ra ta c : x = 0.85(mol) , y = 0.847(mol)Khoi lng cua muoi NaHCO3 = 0.85 x 84 = 71.148 (gam)Khoi lng cua muoi Na2CO3 = 0.847x106 = 89.782 (gam)
BAI TAP 36
Hap thu 15.3 lt kh CO2 o ktc vao 1321.6 gam dung dch KOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)
BAI GIAI
So mol CO2 = 15.3/22.4 = 0.683(mol)So mol KOH =1321.6x10 /( 56 x 100 ) = 2.36(mol)So mol KOH/So mol CO2 = 3.455 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 0.683(mol)Khoi lng muoi K2CO3 = 0.683x138 = 94.254(gam)
BAI TAP 37
Cho m gam P2O5 tac dung vi 3.817 lt dung dch KOH 0.12 M thu c 49.548 gam 2 muoi KH2PO4 va K2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;K=39;H=1)
BAI GIAI
Goi x la so mol cua KH2PO4 , y la so mol cua K2HPO4P2O5+ 2KOH + +H2O = 2KH2PO4 (1)0.5x x xP2O5 + 4KOH = 2K2HPO4 + H2O (2)0.5y 2y yTa co : So mol KOH : x + 2y = 3.817 x 0.12 = 0.458Khoi lng hon hp 2 muoi : 136x + 174y = 49.548Giai ra ta c : x = 0.198(mol) , y = 0.13(mol)Khoi lng cua muoi KH2PO4 = 0.198 x 136 = 26.928 (gam)Khoi lng cua muoi K2HPO4 = 0.13x174 = 22.62 (gam)
BAI TAP 38
Hap thu 8.4 lt kh CO2 o dktc vao 121.396 gam dung dch NaOH 13.18 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 8.4/22.4 = 0.375(mol)So mol NaOH =121.396x13.18 /( 40 x 100 ) = 0.4(mol)1 < So mol NaOH/So mol CO2 = 1.067 < 2 => Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 0.375So mol NaOH : 2x + y = 0.4Giai ra ta c : x= 0.35 (mol) , y = 0.025 (mol)Khoi lng muoi NaHCO3 = 0.35x84 = 29.4(gam)Khoi lng muoi Na2CO3 = 0.025x106 = 2.65(gam)
BAI TAP 39
Hap thu 10.326 lt kh CO2 o dktc vao dung dch NaOH thu c 41.672 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol CO2 : x + y = 10.326 /22.4 = 0.461Khoi lng hon hp 2 muoi : 84x + 106y = 41.672Giai ra ta c : x = 0.33(mol) , y = 0.134(mol)Khoi lng cua muoi NaHCO3 = 0.33 x 84 = 27.468 (gam)Khoi lng cua muoi Na2CO3 = 0.134x106 = 14.204 (gam)
BAI TAP 40
Hap thu 7.459 lt kh SO2 o ktc vao 246.599 gam dung dch KOH 23.52 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)
BAI GIAI
So mol SO2 = 7.459/22.4 = 0.333(mol)So mol KOH =246.599x23.52 /( 56 x 100 ) = 1.45(mol)So mol KOH/So mol SO2 = 4.354 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 0.333(mol)Khoi lng muoi K2SO3 = 0.333x158 = 52.614(gam)
BAI TAP 41
Hap thu V lt kh CO2 o dktc vao 0.308 lt dung dch NaOH 4.14 M thu c 80.856 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.308 x 4.14 = 1.277Khoi lng hon hp 2 muoi : 84x + 106y = 80.856Giai ra ta c : x = 0.43(mol) , y = 0.426(mol)Khoi lng cua muoi NaHCO3 = 0.43 x 84 = 35.7 (gam)Khoi lng cua muoi Na2CO3 = 0.426x106 = 45.156 (gam)
BAI TAP 42
Hap thu 35.28 lt kh CO2 o dktc vao 1.59 lt dung dch NaOH 4.24 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 35.28/22.4 = 1.575(mol)So mol NaOH =1.59x4.24 = 6.74(mol)So mol NaOH/So mol CO2 = 4.279 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.575(mol)Khoi lng muoi Na2CO3 = 1.575x106 = 166.95(gam)
BAI TAP 43
Hap thu 28.269 lt kh CO2 o dktc vao 823.204 gam dung dch NaOH 21.72 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 28.269/22.4 = 1.262(mol)So mol NaOH =823.204x21.72 /( 40 x 100 ) = 4.47(mol)So mol NaOH/So mol CO2 = 3.542 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.262(mol)Khoi lng muoi Na2CO3 = 1.262x106 = 133.772(gam)
BAI TAP 44
Hap thu 28.381 lt kh SO2 o ktc vao 5.648 lt dung dch NaOH 1.28 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 28.381/22.4 = 1.267(mol)So mol NaOH =5.648x1.28 = 7.23(mol)So mol NaOH/So mol SO2 = 5.706 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 1.267(mol)Khoi lng muoi Na2SO3 = 1.267x126 = 159.642(gam)
BAI TAP 45
Hap thu 5.13 lt kh SO2 o dktc vao dung dch NaOH thu c 24.212 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol SO2 : x + y = 5.13 /22.4 = 0.229Khoi lng hon hp 2 muoi : 104x + 126y = 24.212Giai ra ta c : x = 0.211(mol) , y = 0.018(mol)Khoi lng cua muoi NaHSO3 = 0.211 x 104 = 21.944 (gam)Khoi lng cua muoi Na2SO3 = 0.018x126 = 2.268 (gam)
BAI TAP 46
Hap thu V lt kh CO2 o dktc vao 1.789 lt dung dch NaOH 1.82 M thu c 179.016 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 1.789 x 1.82 = 3.256Khoi lng hon hp 2 muoi : 84x + 106y = 179.016Giai ra ta c : x = 0.21(mol) , y = 1.524(mol)Khoi lng cua muoi NaHCO3 = 0.21 x 84 = 17.472 (gam)Khoi lng cua muoi Na2CO3 = 1.524x106 = 161.544 (gam)
BAI TAP 47
Hap thu 18.032 lt kh SO2 o ktc vao 0.578 lt dung dch NaOH 5.21 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 18.032/22.4 = 0.805(mol)So mol NaOH =0.578x5.21 = 3.01(mol)So mol NaOH/So mol SO2 = 3.739 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.805(mol)Khoi lng muoi Na2SO3 = 0.805x126 = 101.43(gam)
BAI TAP 48
Cho 25.56 gam P2O5 tac dung vi lt dung dch NaOH thu c 56.4 gam 2 muoi Na2HPO4 va Na3PO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua Na2HPO4 , y la so mol cua Na3PO4P2O5 + 4NaOH = 2Na2HPO4 + H2O (1)0.5x2x xP2O5 + 6NaOH = 2Na3PO4 + 3H2O (2)0.5y 3y yTa co : So mol P2O5 : 0.5x + 0.5y = 25.56 /142 = 0.18Khoi lng hon hp 2 muoi : 142x + 164y = 56.4Giai ra ta c : x = 0.12(mol) , y = 0.24(mol)Khoi lng cua muoi Na2HPO4 = 0.12 x 142 = 17.04 (gam)Khoi lng cua muoi Na3PO4 = 0.24x164 = 39.36 (gam)
BAI TAP 49
Cho m gam P2O5 tac dung vi 2.658 lt dung dch KOH 1.72 M thu c 429.674 gam 2 muoi KH2PO4 va K2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;K=39;H=1)
BAI GIAI
Goi x la so mol cua KH2PO4 , y la so mol cua K2HPO4P2O5+ 2KOH + +H2O = 2KH2PO4 (1)0.5x x xP2O5 + 4KOH = 2K2HPO4 + H2O (2)0.5y 2y yTa co : So mol KOH : x + 2y = 2.658 x 1.72 = 4.571Khoi lng hon hp 2 muoi : 136x + 174y = 429.674Giai ra ta c : x = 0.653(mol) , y = 1.959(mol)Khoi lng cua muoi KH2PO4 = 0.653 x 136 = 88.808 (gam)Khoi lng cua muoi K2HPO4 = 1.959x174 = 340.866 (gam)
BAI TAP 50
Hap thu V lt kh SO2 o dktc vao 3.879 lt dung dch NaOH 0.29 M thu c 75.18 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 3.879 x 0.29 = 1.125Khoi lng hon hp 2 muoi : 104x + 126y = 75.18Giai ra ta c : x = 0.105(mol) , y = 0.51(mol)Khoi lng cua muoi NaHSO3 = 0.105 x 104 = 10.92 (gam)Khoi lng cua muoi Na2SO3 = 0.51x126 = 64.26 (gam)
BAI TAP 51
Hap thu 5.6 lt kh CO2 o ktc vao 952 gam dung dch KOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)
BAI GIAI
So mol CO2 = 5.6/22.4 = 0.25(mol)So mol KOH =952x10 /( 56 x 100 ) = 1.7(mol)So mol KOH/So mol CO2 = 6.8 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 0.25(mol)Khoi lng muoi K2CO3 = 0.25x138 = 34.5(gam)
BAI TAP 52
Hap thu 28.829 lt kh SO2 o dktc vao 596 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 28.829/22.4 = 1.287(mol)So mol NaOH =596x10 /( 40 x 100 ) = 1.49(mol)1 < So mol NaOH/So mol SO2 = 1.158 < 2 =>Co 2 muoi sinh ra la : NaHSO3 Na2SO3NaOH + SO2 = NaHSO3(1)x x x2NaOH + SO2 = Na2SO3 + H2O(2)2y yyGoi x la so mol cua SO2(1) va y la so mol cua SO2(2)Ta co : So mol SO2 : x+y = 1.287So mol NaOH : 2x + y = 1.49Giai ra ta c : x= 1.084 (mol) , y = 0.203 (mol)Khoi lng muoi NaHSO3 = 1.084x104 = 112.736(g)Khoi lng muoi Na2SO3 = 0.203x126 = 25.578(gam)
BAI TAP 53
Cho 218.822 gam P2O5 tac dung vi 1.738 lt dung dch NaOH 1.45 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)
BAI GIAI
So mol P2O5 = 218.822/142 = 1.541(mol)So mol NaOH =1.738x1.45 = 2.52(mol)0 = < So mol NaOH/So mol P2O5 = 1.635 Co 1 muoi sinh ra la : NaH2PO4P2O5 + 2NaOH +H2O = 2NaH2PO4Ta co : So mol NaH2PO4 = so mol NaOH = 2.52(mol)Khoi lng muoi NaH2PO4 = 2.52x120 = 302.4(gam)
BAI TAP 54
Hap thu 8.98 lt kh CO2 o ktc vao 384.813 gam dung dch KOH 37.4 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)
BAI GIAI
So mol CO2 = 8.98/22.4 = 0.401(mol)So mol KOH =384.813x37.4 /( 56 x 100 ) = 2.57(mol)So mol KOH/So mol CO2 = 6.409 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 0.401(mol)Khoi lng muoi K2CO3 = 0.401x138 = 55.338(gam)
BAI TAP 55
Hap thu 35.168 lt kh CO2 o dktc vao 0.491 lt dung dch NaOH 1.73 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 35.168/22.4 = 1.57(mol)So mol NaOH =0.491x1.73 = 0.85(mol)0 < So mol NaOH/So mol CO2 = 0.541 Co 1 muoi sinh ra la : NaHCO3NaOH + CO2 = NaHCO3Ta co : So mol NaHCO3 = so mol NaOH = 0.85(mol)Khoi lng muoi NaHCO3 = 0.85x84 = 71.4(g)
BAI TAP 56
Hap thu 16.755 lt kh CO2 o dktc vao 53.178 gam dung dch NaOH 30.84 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 16.755/22.4 = 0.748(mol)So mol NaOH =53.178x30.84 /( 40 x 100 ) = 0.41(mol)0 < So mol NaOH/So mol CO2 = 0.548 Co 1 muoi sinh ra la : NaHCO3NaOH + CO2 = NaHCO3Ta co : So mol NaHCO3 = so mol NaOH = 0.41(mol)Khoi lng muoi NaHCO3 = 0.41x84 = 34.44(g)
BAI TAP 57
Hap thu V lt kh SO2 o dktc vao 0.432 lt dung dch NaOH 3.63 M thu c 120.186 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.432 x 3.63 = 1.568Khoi lng hon hp 2 muoi : 104x + 126y = 120.186Giai ra ta c : x = 0.522(mol) , y = 0.523(mol)Khoi lng cua muoi NaHSO3 = 0.522 x 104 = 54.288 (gam)Khoi lng cua muoi Na2SO3 = 0.523x126 = 65.898 (gam)
BAI TAP 58
Hap thu 30.82 lt kh CO2 o dktc vao 1.338 lt dung dch KOH 2.4 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)
BAI GIAI
So mol CO2 = 30.82/22.4 = 1.376(mol)So mol KOH =1.338x2.4 = 3.21(mol)So mol KOH/So mol CO2 = 2.333 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 1.376(mol)Khoi lng muoi K2CO3 = 1.376x138 = 189.888(gam)
BAI TAP 59
Hap thu V lt kh CO2 o dktc vao 0.178 lt dung dch NaOH 1.97 M thu c 23.2 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.178 x 1.97 = 0.35Khoi lng hon hp 2 muoi : 84x + 106y = 23.2Giai ra ta c : x = 0.15(mol) , y = 0.1(mol)Khoi lng cua muoi NaHCO3 = 0.15 x 84 = 12.6 (gam)Khoi lng cua muoi Na2CO3 = 0.1x106 = 10.6 (gam)
BAI TAP 60
Hap thu 12.32 lt kh SO2 o ktc vao 8.215 lt dung dch KOH 0.93 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)
BAI GIAI
So mol SO2 = 12.32/22.4 = 0.55(mol)So mol KOH =8.215x0.93 = 7.64(mol)So mol KOH/So mol SO2 = 13.891 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 0.55(mol)Khoi lng muoi K2SO3 = 0.55x158 = 86.9(gam)
BAI TAP 61
Hap thu 5.6 lt kh CO2 o dktc vao 901.798 gam dung dch NaOH 28.92 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 5.6/22.4 = 0.25(mol)So mol NaOH =901.798x28.92 /( 40 x 100 ) = 6.52(mol)So mol NaOH/So mol CO2 = 26.08 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.25(mol)Khoi lng muoi Na2CO3 = 0.25x106 = 26.5(gam)
BAI TAP 62
Hap thu 22.915 lt kh CO2 o dktc vao 0.144 lt dung dch NaOH 4.43 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 22.915/22.4 = 1.023(mol)So mol NaOH =0.144x4.43 = 0.64(mol)0 < So mol NaOH/So mol CO2 = 0.626 Co 1 muoi sinh ra la : NaHCO3NaOH + CO2 = NaHCO3Ta co : So mol NaHCO3 = so mol NaOH = 0.64(mol)Khoi lng muoi NaHCO3 = 0.64x84 = 53.76(g)
BAI TAP 63
Hap thu 3.091 lt kh SO2 o ktc vao 1.569 lt dung dch NaOH 2.32 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 3.091/22.4 = 0.138(mol)So mol NaOH =1.569x2.32 = 3.64(mol)So mol NaOH/So mol SO2 = 26.377 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.138(mol)Khoi lng muoi Na2SO3 = 0.138x126 = 17.388(gam)
BAI TAP 64
Hap thu 30.509 lt kh CO2 o dktc vao 3.169 lt dung dch NaOH 2.43 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 30.509/22.4 = 1.362(mol)So mol NaOH =3.169x2.43 = 7.7(mol)So mol NaOH/So mol CO2 = 5.653 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.362(mol)Khoi lng muoi Na2CO3 = 1.362x106 = 144.372(gam)
BAI TAP 65
Hap thu 35.526 lt kh SO2 o dktc vao dung dch NaOH thu c 182.39 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol SO2 : x + y = 35.526 /22.4 = 1.586Khoi lng hon hp 2 muoi : 104x + 126y = 182.39Giai ra ta c : x = 0.793(mol) , y = 0.793(mol)Khoi lng cua muoi NaHSO3 = 0.793 x 104 = 82.472 (gam)Khoi lng cua muoi Na2SO3 = 0.793x126 = 99.918 (gam)
BAI TAP 66
Cho 100.678 gam P2O5 tac dung vi 2.172 lt dung dch KOH 1.28 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;K=39;H=1)
BAI GIAI
So mol P2O5 = 100.678/142 = 0.709(mol)So mol KOH =2.172x1.28 = 2.78(mol)2 < So mol KOH/So mol P2O5 = 3.921 < 4 =>Co 2 muoi sinh ra la : KH2PO4 K2HPO4P2O5+ 2KOH + +H2O = 2KH2PO4(1)x 2x2xP2O5 + 4KOH = 2K2HPO4 + H2O(2)y4y2yGoi x la so mol cua P2O5(1) va y la so mol cua P2O5(2)Ta co : So mol P2O5 : x+y = 0.709So mol KOH : 2x + 4y = 2.78Giai ra ta c : x= 0.028 (mol) , y = 0.681 (mol)Khoi lng muoi KH2PO4 = 2x0.028x136 = 7.616(gam)Khoi lng muoi K2HPO4 = 2x0.681x174 = 236.988(gam)
BAI TAP 67
Hap thu 18.726 lt kh SO2 o ktc vao 623.016 gam dung dch KOH 10.08 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)
BAI GIAI
So mol SO2 = 18.726/22.4 = 0.836(mol)So mol KOH =623.016x10.08 /( 56 x 100 ) = 1.57(mol)1 < So mol KOH/So mol SO2 = 1.878 < 2 =>Co 2 muoi sinh ra la : KHSO3 K2SO3KOH + SO2 = KHSO3(1)x xx2KOH + SO2 = K2SO3 + H2O(2)2yyyGoi x la so mol cua SO2(1) va y la so mol cua SO2(2)Ta co : So mol SO2 : x+y = 0.836So mol KOH : 2x + y = 1.57Giai ra ta c : x= 0.102 (mol) , y = 0.734 (mol)Khoi lng muoi KHSO3 = 0.102x120 = 12.24(gam)Khoi lng muoi K2SO3 = 0.734x158 = 115.972(gam)
BAI TAP 68
Hap thu V lt kh CO2 o dktc vao 0.198 lt dung dch NaOH 1.78 M thu c 22.376 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.198 x 1.78 = 0.352Khoi lng hon hp 2 muoi : 84x + 106y = 22.376Giai ra ta c : x = 0.12(mol) , y = 0.116(mol)Khoi lng cua muoi NaHCO3 = 0.12 x 84 = 10.08 (gam)Khoi lng cua muoi Na2CO3 = 0.116x106 = 12.296 (gam)
BAI TAP 69
Hap thu 5.958 lt kh SO2 o dktc vao 490.765 gam dung dch NaOH 37.9 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 5.958/22.4 = 0.266(mol)So mol NaOH =490.765x37.9 /( 40 x 100 ) = 4.65(mol)So mol NaOH/So mol SO2 = 17.481 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.266(mol)Khoi lng muoi Na2SO3 = 0.266x126 = 33.516(gam)
BAI TAP 70
Hap thu 18.794 lt kh SO2 o dktc vao dung dch NaOH thu c 98.146 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol SO2 : x + y = 18.794 /22.4 = 0.839Khoi lng hon hp 2 muoi : 104x + 126y = 98.146Giai ra ta c : x = 0.344(mol) , y = 0.495(mol)Khoi lng cua muoi NaHSO3 = 0.344 x 104 = 35.776 (gam)Khoi lng cua muoi Na2SO3 = 0.495x126 = 62.37 (gam)
BAI TAP 71
Hap thu 9.946 lt kh CO2 o dktc vao 1.895 lt dung dch NaOH 3.14 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 9.946/22.4 = 0.444(mol)So mol NaOH =1.895x3.14 = 5.95(mol)So mol NaOH/So mol CO2 = 13.401 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.444(mol)Khoi lng muoi Na2CO3 = 0.444x106 = 47.064(gam)
BAI TAP 72
Hap thu 12.43 lt kh CO2 o dktc vao 0.888 lt dung dch KOH 4.19 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)
BAI GIAI
So mol CO2 = 12.43/22.4 = 0.555(mol)So mol KOH =0.888x4.19 = 3.72(mol)So mol KOH/So mol CO2 = 6.703 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 0.555(mol)Khoi lng muoi K2CO3 = 0.555x138 = 76.59(gam)
BAI TAP 73
Hap thu 39.133 lt kh CO2 o dktc vao 1.784 lt dung dch NaOH 1.48 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 39.133/22.4 = 1.747(mol)So mol NaOH =1.784x1.48 = 2.64(mol)1 < So mol NaOH/So mol CO2 = 1.511 < 2 =>Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.747So mol NaOH : 2x + y = 2.64Giai ra ta c : x= 0.854 (mol) , y = 0.893 (mol)Khoi lng muoi NaHCO3 = 0.854x84 = 71.736(gam)Khoi lng muoi Na2CO3 = 0.893x106 = 94.658(gam)
BAI TAP 74
Hap thu 2.352 lt kh CO2 o dktc vao 2.892 lt dung dch NaOH 2.68 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 2.352/22.4 = 0.105(mol)So mol NaOH =2.892x2.68 = 7.75(mol)So mol NaOH/So mol CO2 = 73.81 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.105(mol)Khoi lng muoi Na2CO3 = 0.105x106 = 11.13(gam)
BAI TAP 75
Cho 50.41 gam P2O5 tac dung vi 2700 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)
BAI GIAI
So mol P2O5 = 50.41/142 = 0.355(mol)So mol NaOH =2700x10 = 6.75(mol)So mol NaOH/So mol P2O5 = 19.014 > = 6 => Co 1 muoi sinh ra la : Na3PO4P2O5 + 6NaOH = 2Na3PO4 + 3H2OTa co : So mol Na3PO4 = 2 x so mol P2O5 = 2 x 0.355 = 0.71(mol)Khoi lng muoi Na3PO4 = 0.71x164 = 116.44(gam)
BAI TAP 76
Hap thu 2.37 lt kh CO2 o dktc vao 4.041 lt dung dch KOH 1.46 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)
BAI GIAI
So mol CO2 = 2.37/22.4 = 0.106(mol)So mol KOH =4.041x1.46 = 5.9(mol)So mol KOH/So mol CO2 = 55.66 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 0.106(mol)Khoi lng muoi K2CO3 = 0.106x138 = 14.628(gam)
BAI TAP 77
Hap thu 41.731 lt kh CO2 o dktc vao 510.787 gam dung dch NaOH 17.15 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 41.731/22.4 = 1.863(mol)So mol NaOH =510.787x17.15 /( 40 x 100 ) = 2.19(mol)1 < So mol NaOH/So mol CO2 = 1.176 < 2 => Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.863So mol NaOH : 2x + y = 2.19Giai ra ta c : x= 1.536 (mol) , y = 0.327 (mol)Khoi lng muoi NaHCO3 = 1.536x84 = 129.024(gam)Khoi lng muoi Na2CO3 = 0.327x106 = 34.662(gam)
BAI TAP 78
Hap thu 28.806 lt kh SO2 o ktc vao 1.067 lt dung dch KOH 5.7 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)
BAI GIAI
So mol SO2 = 28.806/22.4 = 1.286(mol)So mol KOH =1.067x5.7 = 6.08(mol)So mol KOH/So mol SO2 = 4.728 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 1.286(mol)Khoi lng muoi K2SO3 = 1.286x158 = 203.188(gam)
BAI TAP 79
Hap thu V lt kh CO2 o dktc vao 0.757 lt dung dch NaOH 3.5 M thu c 171.552 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.757 x 3.5 = 2.649Khoi lng hon hp 2 muoi : 84x + 106y = 171.552Giai ra ta c : x = 1(mol) , y = 0.822(mol)Khoi lng cua muoi NaHCO3 = 1 x 84 = 84.42 (gam)Khoi lng cua muoi Na2CO3 = 0.822x106 = 87.132 (gam)
BAI TAP 80
Hap thu 17.987 lt kh CO2 o dktc vao 28.963 lt dung dch NaOH 0.27 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 17.987/22.4 = 0.803(mol)So mol NaOH =28.963x0.27 = 7.82(mol)So mol NaOH/So mol CO2 = 9.738 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.803(mol)Khoi lng muoi Na2CO3 = 0.803x106 = 85.118(gam)
BAI TAP 81
Cho m gam P2O5 tac dung vi 4.25 lt dung dch KOH 1.55 M thu c 500.01 gam 2 muoi K2HPO4 va K3PO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;K=39;H=1)
BAI GIAI
Goi x la so mol cua K2HPO4 , y la so mol cua K3PO4P2O5 + 4KOH = 2K2HPO4 + H2O (1)0.5x2x xP2O5 + 6KOH = 2K3PO4 + 3H2O (2)0.5y3yyTa co : So mol KOH : 2x + 3y = 4.25 x 1.55 = 6.587Khoi lng hon hp 2 muoi : 174x + 212y = 500.01Giai ra ta c : x = 1.057(mol) , y = 1.491(mol)Khoi lng cua muoi K2HPO4 = 1.057 x 174 = 183.918 (gam)Khoi lng cua muoi K3PO4 = 1.491x212 = 316.092 (gam)
BAI TAP 82
Hap thu 20.317 lt kh SO2 o dktc vao 364.888 gam dung dch NaOH 34.86 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 20.317/22.4 = 0.907(mol)So mol NaOH =364.888x34.86 /( 40 x 100 ) = 3.18(mol)So mol NaOH/So mol SO2 = 3.506 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.907(mol)Khoi lng muoi Na2SO3 = 0.907x126 = 114.282(gam)
BAI TAP 83
Cho m gam P2O5 tac dung vi 2.618 lt dung dch KOH 0.55 M thu c 129.592 gam 2 muoi KH2PO4 va K2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;K=39;H=1)
BAI GIAI
Goi x la so mol cua KH2PO4 , y la so mol cua K2HPO4P2O5+ 2KOH + +H2O = 2KH2PO4 (1)0.5x x xP2O5 + 4KOH = 2K2HPO4 + H2O (2)0.5y 2y yTa co : So mol KOH : x + 2y = 2.618 x 0.55 = 1.44Khoi lng hon hp 2 muoi : 136x + 174y = 129.592Giai ra ta c : x = 0.088(mol) , y = 0.676(mol)Khoi lng cua muoi KH2PO4 = 0.088 x 136 = 11.968 (gam)Khoi lng cua muoi K2HPO4 = 0.676x174 = 117.624 (gam)
BAI TAP 84
Hap thu 4.48 lt kh CO2 o dktc vao 0.307 lt dung dch NaOH 3.94 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 4.48/22.4 = 0.2(mol)So mol NaOH =0.307x3.94 = 1.21(mol)So mol NaOH/So mol CO2 = 6.05 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.2(mol)Khoi lng muoi Na2CO3 = 0.2x106 = 21.2(gam)
BAI TAP 85
Hap thu V lt kh CO2 o dktc vao 0.427 lt dung dch NaOH 2.1 M thu c 56.81 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.427 x 2.1 = 0.897Khoi lng hon hp 2 muoi : 84x + 106y = 56.81Giai ra ta c : x = 0.3(mol) , y = 0.299(mol)Khoi lng cua muoi NaHCO3 = 0.3 x 84 = 25.116 (gam)Khoi lng cua muoi Na2CO3 = 0.299x106 = 31.694 (gam)
BAI TAP 86
Hap thu V lt kh SO2 o dktc vao 0.391 lt dung dch NaOH 3.96 M thu c 118.806 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.391 x 3.96 = 1.55Khoi lng hon hp 2 muoi : 104x + 126y = 118.806Giai ra ta c : x = 0.516(mol) , y = 0.517(mol)Khoi lng cua muoi NaHSO3 = 0.516 x 104 = 53.664 (gam)Khoi lng cua muoi Na2SO3 = 0.517x126 = 65.142 (gam)
BAI TAP 87
Hap thu 41.507 lt kh CO2 o dktc vao dung dch NaOH thu c 158.512 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol CO2 : x + y = 41.507 /22.4 = 1.853Khoi lng hon hp 2 muoi : 84x + 106y = 158.512Giai ra ta c : x = 1.72(mol) , y = 0.13(mol)Khoi lng cua muoi NaHCO3 = 1.72 x 84 = 144.732 (gam)Khoi lng cua muoi Na2CO3 = 0.13x106 = 13.78 (gam)
BAI TAP 88
Hap thu 15.434 lt kh SO2 o dktc vao 49.367 gam dung dch NaOH 30.79 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 15.434/22.4 = 0.689(mol)So mol NaOH =49.367x30.79 /( 40 x 100 ) = 0.38(mol)0 < So mol NaOH/So mol SO2 = 0.552 Co 1 muoi sinh ra la : NaHSO3NaOH + SO2 = NaHSO3Ta co :So mol NaHSO3 = so mol NaOH = 0.38(mol)Khoi lng muoi NaHSO3 = 0.38x104 = 39.52(gam)
BAI TAP 89
Hap thu V lt kh SO2 o dktc vao 0.369 lt dung dch KOH 4.58 M thu c 156.514 gam 2 muoi KHSO3 va K2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;K=39;H=1)
BAI GIAI
Goi x la so mol cua KHSO3 , y la so mol cua K2SO3KOH + SO2 = KHSO3 (1)x xx2KOH + SO2 = K2SO3 + H2O (2)2yyyTa co : So mol KOH : x + 2y = 0.369 x 4.58 = 1.689Khoi lng hon hp 2 muoi : 120x + 158y = 156.514Giai ra ta c : x = 0.563(mol) , y = 0.563(mol)Khoi lng cua muoi KHSO3 = 0.563 x 120 = 67.56 (gam)Khoi lng cua muoi K2SO3 = 0.563x158 = 88.954 (gam)
BAI TAP 90
Hap thu V lt kh SO2 o dktc vao 0.122 lt dung dch NaOH 4.89 M thu c 50.422 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.122 x 4.89 = 0.596Khoi lng hon hp 2 muoi : 104x + 126y = 50.422Giai ra ta c : x = 0.314(mol) , y = 0.141(mol)Khoi lng cua muoi NaHSO3 = 0.314 x 104 = 32.656 (gam)Khoi lng cua muoi Na2SO3 = 0.141x126 = 17.766 (gam)
BAI TAP 91
Hap thu 11.379 lt kh SO2 o ktc vao 0.386 lt dung dch NaOH 4.71 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 11.379/22.4 = 0.508(mol)So mol NaOH =0.386x4.71 = 1.82(mol)So mol NaOH/So mol SO2 = 3.583 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.508(mol)Khoi lng muoi Na2SO3 = 0.508x126 = 64.008(gam)
BAI TAP 92
Hap thu 23.139 lt kh CO2 o dktc vao 1.975 lt dung dch NaOH 2.82 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 23.139/22.4 = 1.033(mol)So mol NaOH =1.975x2.82 = 5.57(mol)So mol NaOH/So mol CO2 = 5.392 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.033(mol)Khoi lng muoi Na2CO3 = 1.033x106 = 109.498(gam)
BAI TAP 93
Hap thu 34.563 lt kh CO2 o dktc vao 1.654 lt dung dch NaOH 3.58 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 34.563/22.4 = 1.543(mol)So mol NaOH =1.654x3.58 = 5.92(mol)So mol NaOH/So mol CO2 = 3.837 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.543(mol)Khoi lng muoi Na2CO3 = 1.543x106 = 163.558(gam)
BAI TAP 94
Hap thu 35.66 lt kh CO2 o dktc vao 0.837 lt dung dch KOH 4.29 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)
BAI GIAI
So mol CO2 = 35.66/22.4 = 1.592(mol)So mol KOH =0.837x4.29 = 3.59(mol)So mol KOH/So mol CO2 = 2.255 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 1.592(mol)Khoi lng muoi K2CO3 = 1.592x138 = 219.696(gam)
BAI TAP 95
Hap thu 12.253 lt kh CO2 o dktc vao 0.269 lt dung dch NaOH 1.34 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 12.253/22.4 = 0.547(mol)So mol NaOH =0.269x1.34 = 0.36(mol)0 < So mol NaOH/So mol CO2 = 0.658 Co 1 muoi sinh ra la : NaHCO3NaOH + CO2 = NaHCO3Ta co : So mol NaHCO3 = so mol NaOH = 0.36(mol)Khoi lng muoi NaHCO3 = 0.36x84 = 30.24(g)
BAI TAP 96
Cho 107.494 gam P2O5 tac dung vi lt dung dch NaOH thu c 206.67 gam 2 muoi NaH2PO4 va Na2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaH2PO4 , y la so mol cua Na2HPO4P2O5 + 2NaOH +H2O = 2NaH2PO4 (1)0.5x xxP2O5 + 4NaOH = 2Na2HPO4 + H2O (2)0.5y2yyTa co : So mol P2O5 : 0.5x + 0.5y = 107.494 /142 = 0.757Khoi lng hon hp 2 muoi : 120x + 142y = 206.67Giai ra ta c : x = 0.38(mol) , y = 1.14(mol)Khoi lng cua muoi NaH2PO4 = 0.38 x 120 = 45.36 (gam)Khoi lng cua muoi Na2HPO4 = 1.14x142 = 161.312 (gam)
BAI TAP 97
Hap thu V lt kh SO2 o dktc vao 1.17 lt dung dch NaOH 2.54 M thu c 227.826 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 1.17 x 2.54 = 2.972Khoi lng hon hp 2 muoi : 104x + 126y = 227.826Giai ra ta c : x = 0.99(mol) , y = 0.991(mol)Khoi lng cua muoi NaHSO3 = 0.99 x 104 = 102.96 (gam)Khoi lng cua muoi Na2SO3 = 0.991x126 = 124.866 (gam)
BAI TAP 98
Hap thu 12.9 lt kh CO2 o dktc vao 0.15 lt dung dch KOH 4.53 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)
BAI GIAI
So mol CO2 = 12.9/22.4 = 0.576(mol)So mol KOH =0.15x4.53 = 0.68(mol)1 < So mol KOH/So mol CO2 = 1.181 < 2 =>Co 2 muoi sinh ra la : KHCO3 K2CO3KOH + CO2 = KHCO3(1)x x x2KOH + CO2 = K2CO3 + H2O(2)2yy yGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 0.576So mol KOH : 2x + y = 0.68Giai ra ta c : x= 0.472 (mol) , y = 0.104 (mol)Khoi lng muoi KHCO3 = 0.472x100 = 47.2(gam)Khoi lng muoi K2CO3 = 0.104x138 = 14.352(gam)
BAI TAP 99
Cho 246.938 gam P2O5 tac dung vi 288.928 gam dung dch KOH 34.5 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;K=39;H=1)
BAI GIAI
So mol P2O5 = 246.938/142 = 1.739(mol)So mol KOH =288.928x34.5 /( 56 x 100 ) = 1.78(mol)0 = < So mol KOH/So mol P2O5 = 1.024 Co 1 muoi sinh ra la : KH2PO4P2O5+ 2KOH + +H2O = 2KH2PO4Ta co : So mol KH2PO4 = so mol KOH = 1.78(mol)Khoi lng muoi KH2PO4 = 1.78x136 = 242.08(gam)
BAI TAP 100
Cho m gam P2O5 tac dung vi 0.74 lt dung dch NaOH 4.87 M thu c 235.436 gam 2 muoi Na2HPO4 va Na3PO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua Na2HPO4 , y la so mol cua Na3PO4P2O5 + 4NaOH = 2Na2HPO4 + H2O (1)0.5x2x xP2O5 + 6NaOH = 2Na3PO4 + 3H2O (2)0.5y 3y yTa co : So mol NaOH : x + 2y = 0.74 x 4.87 = 3.61Khoi lng hon hp 2 muoi : 142x + 164y = 235.436Giai ra ta c : x = 1.166(mol) , y = 0.426(mol)Khoi lng cua muoi Na2HPO4 = 1.166 x 142 = 165.572 (gam)Khoi lng cua muoi Na3PO4 = 0.426x164 = 69.864 (gam)
BAI TAP 101
Hap thu 27.776 lt kh SO2 o ktc vao 1.679 lt dung dch KOH 1.68 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)
BAI GIAI
So mol SO2 = 27.776/22.4 = 1.24(mol)So mol KOH =1.679x1.68 = 2.82(mol)So mol KOH/So mol SO2 = 2.274 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 1.24(mol)Khoi lng muoi K2SO3 = 1.24x158 = 195.92(gam)
BAI TAP 102
Hap thu 25.738 lt kh SO2 o ktc vao 0.575 lt dung dch KOH 5.13 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)
BAI GIAI
So mol SO2 = 25.738/22.4 = 1.149(mol)So mol KOH =0.575x5.13 = 2.95(mol)So mol KOH/So mol SO2 = 2.567 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 1.149(mol)Khoi lng muoi K2SO3 = 1.149x158 = 181.542(gam)
BAI TAP 103
Hap thu 44.374 lt kh SO2 o dktc vao 2912 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 44.374/22.4 = 1.981(mol)So mol NaOH =2912x10 /( 40 x 100 ) = 7.28(mol)So mol NaOH/So mol SO2 = 3.675 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 1.981(mol)Khoi lng muoi Na2SO3 = 1.981x126 = 249.606(gam)
BAI TAP 104
Hap thu V lt kh CO2 o dktc vao 1.032 lt dung dch NaOH 2.02 M thu c 158.192 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 1.032 x 2.02 = 2.084Khoi lng hon hp 2 muoi : 84x + 106y = 158.192Giai ra ta c : x = 1.54(mol) , y = 0.272(mol)Khoi lng cua muoi NaHCO3 = 1.54 x 84 = 129.36 (gam)Khoi lng cua muoi Na2CO3 = 0.272x106 = 28.832 (gam)
BAI TAP 105
Hap thu 23.43 lt kh CO2 o dktc vao 0.737 lt dung dch NaOH 1.86 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 23.43/22.4 = 1.046(mol)So mol NaOH =0.737x1.86 = 1.37(mol)1 < So mol NaOH/So mol CO2 = 1.31 < 2 =>Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.046So mol NaOH : 2x + y = 1.37Giai ra ta c : x= 0.722 (mol) , y = 0.324 (mol)Khoi lng muoi NaHCO3 = 0.722x84 = 60.648(gam)Khoi lng muoi Na2CO3 = 0.324x106 = 34.344(gam)
BAI TAP 106
Cho m gam P2O5 tac dung vi 5.56 lt dung dch NaOH 0.25 M thu c 85.852 gam 2 muoi Na2HPO4 va Na3PO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua Na2HPO4 , y la so mol cua Na3PO4P2O5 + 4NaOH = 2Na2HPO4 + H2O (1)0.5x2x xP2O5 + 6NaOH = 2Na3PO4 + 3H2O (2)0.5y 3y yTa co : So mol NaOH : x + 2y = 5.56 x 0.25 = 1.39Khoi lng hon hp 2 muoi : 142x + 164y = 85.852Giai ra ta c : x = 0.302(mol) , y = 0.262(mol)Khoi lng cua muoi Na2HPO4 = 0.302 x 142 = 42.884 (gam)Khoi lng cua muoi Na3PO4 = 0.262x164 = 42.968 (gam)
BAI TAP 107
Hap thu 3.114 lt kh CO2 o dktc vao 1400 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 3.114/22.4 = 0.139(mol)So mol NaOH =1400x10 /( 40 x 100 ) = 3.5(mol)So mol NaOH/So mol CO2 = 25.18 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.139(mol)Khoi lng muoi Na2CO3 = 0.139x106 = 14.734(gam)
BAI TAP 108
Hap thu V lt kh SO2 o dktc vao 0.202 lt dung dch NaOH 4.62 M thu c 67.534 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.202 x 4.62 = 0.934Khoi lng hon hp 2 muoi : 104x + 126y = 67.534Giai ra ta c : x = 0.212(mol) , y = 0.361(mol)Khoi lng cua muoi NaHSO3 = 0.212 x 104 = 22.048 (gam)Khoi lng cua muoi Na2SO3 = 0.361x126 = 45.486 (gam)
BAI TAP 109
Hap thu 18.726 lt kh SO2 o dktc vao 289.704 gam dung dch NaOH 30.79 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 18.726/22.4 = 0.836(mol)So mol NaOH =289.704x30.79 /( 40 x 100 ) = 2.23(mol)So mol NaOH/So mol SO2 = 2.667 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.836(mol)Khoi lng muoi Na2SO3 = 0.836x126 = 105.336(gam)
BAI TAP 110
Hap thu 16.24 lt kh SO2 o ktc vao 1.128 lt dung dch NaOH 5.7 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 16.24/22.4 = 0.725(mol)So mol NaOH =1.128x5.7 = 6.43(mol)So mol NaOH/So mol SO2 = 8.869 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.725(mol)Khoi lng muoi Na2SO3 = 0.725x126 = 91.35(gam)
BAI TAP 111
Hap thu 37.274 lt kh CO2 o dktc vao 1.725 lt dung dch NaOH 4.55 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 37.274/22.4 = 1.664(mol)So mol NaOH =1.725x4.55 = 7.85(mol)So mol NaOH/So mol CO2 = 4.718 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.664(mol)Khoi lng muoi Na2CO3 = 1.664x106 = 176.384(gam)
BAI TAP 112
Hap thu V lt kh CO2 o dktc vao 0.412 lt dung dch NaOH 4.5 M thu c 98.488 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.412 x 4.5 = 1.853Khoi lng hon hp 2 muoi : 84x + 106y = 98.488Giai ra ta c : x = 0.01(mol) , y = 0.922(mol)Khoi lng cua muoi NaHCO3 = 0.01 x 84 = 0.756 (gam)Khoi lng cua muoi Na2CO3 = 0.922x106 = 97.732 (gam)
BAI TAP 113
Hap thu 38.662 lt kh CO2 o dktc vao 1072 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 38.662/22.4 = 1.726(mol)So mol NaOH =1072x10 /( 40 x 100 ) = 2.68(mol)1 < So mol NaOH/So mol CO2 = 1.553 < 2 => Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.726So mol NaOH : 2x + y = 2.68Giai ra ta c : x= 0.772 (mol) , y = 0.954 (mol)Khoi lng muoi NaHCO3 = 0.772x84 = 64.848(gam)Khoi lng muoi Na2CO3 = 0.954x106 = 101.124(gam)
BAI TAP 114
Hap thu 23.878 lt kh CO2 o dktc vao 0.9 lt dung dch NaOH 2.99 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 23.878/22.4 = 1.066(mol)So mol NaOH =0.9x2.99 = 2.69(mol)So mol NaOH/So mol CO2 = 2.523 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.066(mol)Khoi lng muoi Na2CO3 = 1.066x106 = 112.996(gam)
BAI TAP 115
Hap thu 26.947 lt kh CO2 o dktc vao dung dch NaOH thu c 112.162 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol CO2 : x + y = 26.947 /22.4 = 1.203Khoi lng hon hp 2 muoi : 84x + 106y = 112.162Giai ra ta c : x = 0.7(mol) , y = 0.505(mol)Khoi lng cua muoi NaHCO3 = 0.7 x 84 = 58.632 (gam)Khoi lng cua muoi Na2CO3 = 0.505x106 = 53.53 (gam)
BAI TAP 116
Hap thu 24.058 lt kh SO2 o dktc vao 178.351 gam dung dch NaOH 38.8 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 24.058/22.4 = 1.074(mol)So mol NaOH =178.351x38.8 /( 40 x 100 ) = 1.73(mol)1 < So mol NaOH/So mol SO2 = 1.611 < 2 =>Co 2 muoi sinh ra la : NaHSO3 Na2SO3NaOH + SO2 = NaHSO3(1)x x x2NaOH + SO2 = Na2SO3 + H2O(2)2y yyGoi x la so mol cua SO2(1) va y la so mol cua SO2(2)Ta co : So mol SO2 : x+y = 1.074So mol NaOH : 2x + y = 1.73Giai ra ta c : x= 0.418 (mol) , y = 0.656 (mol)Khoi lng muoi NaHSO3 = 0.418x104 = 43.472(g)Khoi lng muoi Na2SO3 = 0.656x126 = 82.656(gam)
BAI TAP 117
Hap thu 23.744 lt kh CO2 o dktc vao 1.911 lt dung dch NaOH 3.03 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 23.744/22.4 = 1.06(mol)So mol NaOH =1.911x3.03 = 5.79(mol)So mol NaOH/So mol CO2 = 5.462 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.06(mol)Khoi lng muoi Na2CO3 = 1.06x106 = 112.36(gam)
BAI TAP 118
Hap thu V lt kh CO2 o dktc vao 0.355 lt dung dch NaOH 5.64 M thu c 126.646 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.355 x 5.64 = 2Khoi lng hon hp 2 muoi : 84x + 106y = 126.646Giai ra ta c : x = 0.67(mol) , y = 0.667(mol)Khoi lng cua muoi NaHCO3 = 0.67 x 84 = 55.944 (gam)Khoi lng cua muoi Na2CO3 = 0.667x106 = 70.702 (gam)
BAI TAP 119
Hap thu 15.165 lt kh SO2 o dktc vao 546.465 gam dung dch NaOH 39.6 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 15.165/22.4 = 0.677(mol)So mol NaOH =546.465x39.6 /( 40 x 100 ) = 5.41(mol)So mol NaOH/So mol SO2 = 7.991 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.677(mol)Khoi lng muoi Na2SO3 = 0.677x126 = 85.302(gam)
BAI TAP 120
Hap thu 20.765 lt kh SO2 o ktc vao 2.76 lt dung dch NaOH 2.71 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 20.765/22.4 = 0.927(mol)So mol NaOH =2.76x2.71 = 7.48(mol)So mol NaOH/So mol SO2 = 8.069 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.927(mol)Khoi lng muoi Na2SO3 = 0.927x126 = 116.802(gam)
BAI TAP 121
Hap thu 27.642 lt kh CO2 o dktc vao 416.345 gam dung dch NaOH 12.97 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 27.642/22.4 = 1.234(mol)So mol NaOH =416.345x12.97 /( 40 x 100 ) = 1.35(mol)1 < So mol NaOH/So mol CO2 = 1.094 < 2 => Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.234So mol NaOH : 2x + y = 1.35Giai ra ta c : x= 1.118 (mol) , y = 0.116 (mol)Khoi lng muoi NaHCO3 = 1.118x84 = 93.912(gam)Khoi lng muoi Na2CO3 = 0.116x106 = 12.296(gam)
BAI TAP 122
Hap thu 37.632 lt kh SO2 o dktc vao 1532 gam dung dch NaOH 10 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 37.632/22.4 = 1.68(mol)So mol NaOH =1532x10 /( 40 x 100 ) = 3.83(mol)So mol NaOH/So mol SO2 = 2.28 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 1.68(mol)Khoi lng muoi Na2SO3 = 1.68x126 = 211.68(gam)
BAI TAP 123
Hap thu V lt kh SO2 o dktc vao 0.047 lt dung dch NaOH 3.86 M thu c 14.03 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.047 x 3.86 = 0.183Khoi lng hon hp 2 muoi : 104x + 126y = 14.03Giai ra ta c : x = 0.061(mol) , y = 0.061(mol)Khoi lng cua muoi NaHSO3 = 0.061 x 104 = 6.344 (gam)Khoi lng cua muoi Na2SO3 = 0.061x126 = 7.686 (gam)
BAI TAP 124
Hap thu 20.339 lt kh CO2 o dktc vao 4.375 lt dung dch NaOH 0.48 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 20.339/22.4 = 0.908(mol)So mol NaOH =4.375x0.48 = 2.1(mol)So mol NaOH/So mol CO2 = 2.313 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.908(mol)Khoi lng muoi Na2CO3 = 0.908x106 = 96.248(gam)
BAI TAP 125
Hap thu 7.952 lt kh SO2 o ktc vao 0.271 lt dung dch NaOH 5.5 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 7.952/22.4 = 0.355(mol)So mol NaOH =0.271x5.5 = 1.49(mol)So mol NaOH/So mol SO2 = 4.197 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.355(mol)Khoi lng muoi Na2SO3 = 0.355x126 = 44.73(gam)
BAI TAP 126
Hap thu V lt kh CO2 o dktc vao 1.224 lt dung dch NaOH 1.15 M thu c 106.864 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 1.224 x 1.15 = 1.408Khoi lng hon hp 2 muoi : 84x + 106y = 106.864Giai ra ta c : x = 1.04(mol) , y = 0.184(mol)Khoi lng cua muoi NaHCO3 = 1.04 x 84 = 87.36 (gam)Khoi lng cua muoi Na2CO3 = 0.184x106 = 19.504 (gam)
BAI TAP 127
Hap thu 5.6 lt kh CO2 o dktc vao 880.952 gam dung dch NaOH 18.48 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 5.6/22.4 = 0.25(mol)So mol NaOH =880.952x18.48 /( 40 x 100 ) = 4.07(mol)So mol NaOH/So mol CO2 = 16.28 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.25(mol)Khoi lng muoi Na2CO3 = 0.25x106 = 26.5(gam)
BAI TAP 128
Hap thu 34.563 lt kh SO2 o ktc vao 0.155 lt dung dch KOH 2.2 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)
BAI GIAI
So mol SO2 = 34.563 / 22.4 = 1.543 (mol) So mol KOH =0.155x2.2 = 0.34(mol)0 < So mol KOH/So mol SO2 = 0.22 Co 1 muoi sinh ra la : KHSO3KOH + SO2 = KHSO3Ta co : So mol KHSO3 = so mol KOH = 0.34(mol)Khoi lng muoi KHSO3 = 0.34x120 = 40.8(gam)
BAI TAP 129
Cho m gam P2O5 tac dung vi 4.52 lt dung dch NaOH 1.32 M thu c 465.52 gam 2 muoi NaH2PO4 va Na2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaH2PO4 , y la so mol cua Na2HPO4P2O5 + 2NaOH +H2O = 2NaH2PO4 (1)0.5x xxP2O5 + 4NaOH = 2Na2HPO4 + H2O (2)0.5y2yyTa co : So mol NaOH : x + 2y = 4.52 x 1.32 = 5.97Khoi lng hon hp 2 muoi : 120x + 142y = 465.52Giai ra ta c : x = 0.85(mol) , y = 2.56(mol)Khoi lng cua muoi NaH2PO4 = 0.85 x 120 = 102 (gam)Khoi lng cua muoi Na2HPO4 = 2.56x142 = 363.52 (gam)
BAI TAP 130
Hap thu 39.894 lt kh CO2 o dktc vao 0.582 lt dung dch NaOH 4.79 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 39.894/22.4 = 1.781(mol)So mol NaOH =0.582x4.79 = 2.79(mol)1 < So mol NaOH/So mol CO2 = 1.567 < 2 =>Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.781So mol NaOH : 2x + y = 2.79Giai ra ta c : x= 0.772 (mol) , y = 1.009 (mol)Khoi lng muoi NaHCO3 = 0.772x84 = 64.848(gam)Khoi lng muoi Na2CO3 = 1.009x106 = 106.954(gam)
BAI TAP 131
Hap thu 37.274 lt kh SO2 o dktc vao 754.453 gam dung dch NaOH 28.63 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 37.274/22.4 = 1.664(mol)So mol NaOH =754.453x28.63 /( 40 x 100 ) = 5.4(mol)So mol NaOH/So mol SO2 = 3.245 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 1.664(mol)Khoi lng muoi Na2SO3 = 1.664x126 = 209.664(gam)
BAI TAP 132
Hap thu V lt kh CO2 o dktc vao 0.57 lt dung dch KOH 2.09 M thu c 99.942 gam 2 muoi KHCO3 va K2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;K=39;H=1)
BAI GIAI
Goi x la so mol cua KHCO3 , y la so mol cua K2CO3KOH + CO2 = KHCO3 (1)x xx2KOH + CO2 = K2CO3 + H2O (2)2yy yTa co : So mol KOH : x + 2y = 0.57 x 2.09 = 1.191Khoi lng hon hp 2 muoi : 100x + 138y = 99.942Giai ra ta c : x = 0.573(mol) , y = 0.309(mol)Khoi lng cua muoi KHCO3 = 0.573 x 100 = 57.3 (gam)Khoi lng cua muoi K2CO3 = 0.309x138 = 42.642 (gam)
BAI TAP 133
Hap thu 44.666 lt kh SO2 o dktc vao 60.844 gam dung dch NaOH 38.13 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 44.666/22.4 = 1.994(mol)So mol NaOH =60.844x38.13 /( 40 x 100 ) = 0.58(mol)0 < So mol NaOH/So mol SO2 = 0.291 Co 1 muoi sinh ra la : NaHSO3NaOH + SO2 = NaHSO3Ta co :So mol NaHSO3 = so mol NaOH = 0.58(mol)Khoi lng muoi NaHSO3 = 0.58x104 = 60.32(gam)
BAI TAP 134
Hap thu 19.958 lt kh SO2 o dktc vao 643.902 gam dung dch NaOH 36.9 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 19.958/22.4 = 0.891(mol)So mol NaOH =643.902x36.9 /( 40 x 100 ) = 5.94(mol)So mol NaOH/So mol SO2 = 6.667 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.891(mol)Khoi lng muoi Na2SO3 = 0.891x126 = 112.266(gam)
BAI TAP 135
Hap thu 22.714 lt kh CO2 o dktc vao dung dch NaOH thu c 102.358 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol CO2 : x + y = 22.714 /22.4 = 1.014Khoi lng hon hp 2 muoi : 84x + 106y = 102.358Giai ra ta c : x = 0.23(mol) , y = 0.781(mol)Khoi lng cua muoi NaHCO3 = 0.23 x 84 = 19.572 (gam)Khoi lng cua muoi Na2CO3 = 0.781x106 = 82.786 (gam)
BAI TAP 136
Hap thu 25.088 lt kh SO2 o ktc vao 868.04 gam dung dch KOH 26.22 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)
BAI GIAI
So mol SO2 = 25.088/22.4 = 1.12(mol)So mol KOH =868.04x26.22 /( 56 x 100 ) = 5.69(mol)So mol KOH/So mol SO2 = 5.08 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 1.12(mol)Khoi lng muoi K2SO3 = 1.12x158 = 176.96(gam)
BAI TAP 137
Hap thu 20 lt kh CO2 o dktc vao 17.225 lt dung dch KOH 0.4 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)
BAI GIAI
So mol CO2 = 20/22.4 = 0.893(mol)So mol KOH =17.225x0.4 = 6.89(mol)So mol KOH/So mol CO2 = 7.716 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 0.893(mol)Khoi lng muoi K2CO3 = 0.893x138 = 123.234(gam)
BAI TAP 138
Hap thu 6.966 lt kh CO2 o dktc vao 0.584 lt dung dch NaOH 3.87 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 6.966/22.4 = 0.311(mol)So mol NaOH =0.584x3.87 = 2.26(mol)So mol NaOH/So mol CO2 = 7.267 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.311(mol)Khoi lng muoi Na2CO3 = 0.311x106 = 32.966(gam)
BAI TAP 139
Hap thu 41.194 lt kh SO2 o dktc vao 186.559 gam dung dch NaOH 27.23 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 41.194/22.4 = 1.839(mol)So mol NaOH =186.559x27.23 /( 40 x 100 ) = 1.27(mol)0 < So mol NaOH/So mol SO2 = 0.691 Co 1 muoi sinh ra la : NaHSO3NaOH + SO2 = NaHSO3Ta co :So mol NaHSO3 = so mol NaOH = 1.27(mol)Khoi lng muoi NaHSO3 = 1.27x104 = 132.08(gam)
BAI TAP 140
Hap thu 30.262 lt kh SO2 o ktc vao 0.61 lt dung dch NaOH 0.82 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 30.262/22.4 = 1.351(mol)So mol NaOH =0.61x0.82 = 0.5(mol)0 < So mol NaOH/So mol SO2 = 0.37 Co 1 muoi sinh ra la : NaHSO3NaOH + SO2 = NaHSO3Ta co :So mol NaHSO3 = so mol NaOH = 0.5(mol)Khoi lng muoi NaHSO3 = 0.5x104 = 52(gam)
BAI TAP 141
Hap thu 11.11 lt kh CO2 o dktc vao 0.694 lt dung dch NaOH 5.27 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 11.11/22.4 = 0.496(mol)So mol NaOH =0.694x5.27 = 3.66(mol)So mol NaOH/So mol CO2 = 7.379 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.496(mol)Khoi lng muoi Na2CO3 = 0.496x106 = 52.576(gam)
BAI TAP 142
Hap thu 43.389 lt kh CO2 o dktc vao 1.61 lt dung dch NaOH 2.46 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 43.389/22.4 = 1.937(mol)So mol NaOH =1.61x2.46 = 3.96(mol)So mol NaOH/So mol CO2 = 2.044 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.937(mol)Khoi lng muoi Na2CO3 = 1.937x106 = 205.322(gam)
BAI TAP 143
Hap thu 10.73 lt kh CO2 o dktc vao 467.571 gam dung dch NaOH 27.29 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 10.73/22.4 = 0.479(mol)So mol NaOH =467.571x27.29 /( 40 x 100 ) = 3.19(mol)So mol NaOH/So mol CO2 = 6.66 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.479(mol)Khoi lng muoi Na2CO3 = 0.479x106 = 50.774(gam)
BAI TAP 144
Hap thu 5.6 lt kh CO2 o dktc vao 945.551 gam dung dch NaOH 30.12 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 5.6/22.4 = 0.25(mol)So mol NaOH =945.551x30.12 /( 40 x 100 ) = 7.12(mol)So mol NaOH/So mol CO2 = 28.48 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.25(mol)Khoi lng muoi Na2CO3 = 0.25x106 = 26.5(gam)
BAI TAP 145
Hap thu 22.467 lt kh SO2 o ktc vao 5.171 lt dung dch KOH 0.82 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)
BAI GIAI
So mol SO2 = 22.467/22.4 = 1.003(mol)So mol KOH =5.171x0.82 = 4.24(mol)So mol KOH/So mol SO2 = 4.227 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 1.003(mol)Khoi lng muoi K2SO3 = 1.003x158 = 158.474(gam)
BAI TAP 146
Hap thu 22.848 lt kh CO2 o dktc vao 6.114 lt dung dch NaOH 0.35 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 22.848/22.4 = 1.02(mol)So mol NaOH =6.114x0.35 = 2.14(mol)So mol NaOH/So mol CO2 = 2.098 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 1.02(mol)Khoi lng muoi Na2CO3 = 1.02x106 = 108.12(gam)
BAI TAP 147
Hap thu V lt kh CO2 o dktc vao 0.078 lt dung dch NaOH 3.28 M thu c 21.11 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.078 x 3.28 = 0.255Khoi lng hon hp 2 muoi : 84x + 106y = 21.11Giai ra ta c : x = 0.25(mol) , y = 0.005(mol)Khoi lng cua muoi NaHCO3 = 0.25 x 84 = 20.58 (gam)Khoi lng cua muoi Na2CO3 = 0.005x106 = 0.53 (gam)
BAI TAP 148
Hap thu V lt kh SO2 o dktc vao 0.036 lt dung dch NaOH 5.05 M thu c 13.762 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.036 x 5.05 = 0.182Khoi lng hon hp 2 muoi : 104x + 126y = 13.762Giai ra ta c : x = 0.056(mol) , y = 0.063(mol)Khoi lng cua muoi NaHSO3 = 0.056 x 104 = 5.824 (gam)Khoi lng cua muoi Na2SO3 = 0.063x126 = 7.938 (gam)
BAI TAP 149
Cho m gam P2O5 tac dung vi 0.1 lt dung dch NaOH 4.63 M thu c 40.72 gam 2 muoi NaH2PO4 va Na2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaH2PO4 , y la so mol cua Na2HPO4P2O5 + 2NaOH +H2O = 2NaH2PO4 (1)0.5x xxP2O5 + 4NaOH = 2Na2HPO4 + H2O (2)0.5y2yyTa co : So mol NaOH : x + 2y = 0.1 x 4.63 = 0.47Khoi lng hon hp 2 muoi : 120x + 142y = 40.72Giai ra ta c : x = 0.15(mol) , y = 0.16(mol)Khoi lng cua muoi NaH2PO4 = 0.15 x 120 = 18 (gam)Khoi lng cua muoi Na2HPO4 = 0.16x142 = 22.72 (gam)
BAI TAP 150
Hap thu 10.349 lt kh SO2 o ktc vao 0.832 lt dung dch NaOH 3.52 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 10.349/22.4 = 0.462(mol)So mol NaOH =0.832x3.52 = 2.93(mol)So mol NaOH/So mol SO2 = 6.342 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.462(mol)Khoi lng muoi Na2SO3 = 0.462x126 = 58.212(gam)
BAI TAP 151
Hap thu V lt kh SO2 o dktc vao 0.445 lt dung dch KOH 3.99 M thu c 164.576 gam 2 muoi KHSO3 va K2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;K=39;H=1)
BAI GIAI
Goi x la so mol cua KHSO3 , y la so mol cua K2SO3KOH + SO2 = KHSO3 (1)x xx2KOH + SO2 = K2SO3 + H2O (2)2yyyTa co : So mol KOH : x + 2y = 0.445 x 3.99 = 1.776Khoi lng hon hp 2 muoi : 120x + 158y = 164.576Giai ra ta c : x = 0.592(mol) , y = 0.592(mol)Khoi lng cua muoi KHSO3 = 0.592 x 120 = 71.04 (gam)Khoi lng cua muoi K2SO3 = 0.592x158 = 93.536 (gam)
BAI TAP 152
Hap thu 32.166 lt kh CO2 o dktc vao dung dch KOH thu c 170.884 gam 2 muoi KHCO3 va K2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;K=39;H=1)
BAI GIAI
Goi x la so mol cua KHCO3 , y la so mol cua K2CO3KOH + CO2 = KHCO3 (1)x xx2KOH + CO2 = K2CO3 + H2O (2)2yy yTa co : So mol CO2 : x + y = 32.166 /22.4 = 1.436Khoi lng hon hp 2 muoi : 100x + 138y = 170.884Giai ra ta c : x = 0.718(mol) , y = 0.718(mol)Khoi lng cua muoi KHCO3 = 0.718 x 100 = 71.8 (gam)Khoi lng cua muoi K2CO3 = 0.718x138 = 99.084 (gam)
BAI TAP 153
Hap thu 17.05 lt kh CO2 o dktc vao 1.333 lt dung dch KOH 0.18 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)
BAI GIAI
So mol CO2 = 17.05/22.4 = 0.761(mol)So mol KOH =1.333x0.18 = 0.24(mol)0 < So mol KOH/So mol CO2 = 0.315 < = 1 => Co 1 muoi sinh ra la : KHCO3KOH + CO2 = KHCO3Ta co : So mol KHCO3 = so mol KOH = 0.24(mol)Khoi lng muoi KHCO3 = 0.24x100 = 24(gam)
BAI TAP 154
Cho 282.864 gam P2O5 tac dung vi 1.355 lt dung dch KOH 3.75 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;K=39;H=1)
BAI GIAI
So mol P2O5 = 282.864/142 = 1.992(mol)So mol KOH =1.355x3.75 = 5.08(mol)2 < So mol KOH/So mol P2O5 = 2.55 < 4 =>Co 2 muoi sinh ra la : KH2PO4 K2HPO4P2O5+ 2KOH + +H2O = 2KH2PO4(1)x 2x2xP2O5 + 4KOH = 2K2HPO4 + H2O(2)y4y2yGoi x la so mol cua P2O5(1) va y la so mol cua P2O5(2)Ta co : So mol P2O5 : x+y = 1.992So mol KOH : 2x + 4y = 5.08Giai ra ta c : x= 1.444 (mol) , y = 0.548 (mol)Khoi lng muoi KH2PO4 = 2x1.444x136 = 392.768(gam)Khoi lng muoi K2HPO4 = 2x0.548x174 = 190.704(gam)
BAI TAP 155
Cho m gam P2O5 tac dung vi 2.57 lt dung dch NaOH 1.43 M thu c 286.15 gam 2 muoi NaH2PO4 va Na2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaH2PO4 , y la so mol cua Na2HPO4P2O5 + 2NaOH +H2O = 2NaH2PO4 (1)0.5x xxP2O5 + 4NaOH = 2Na2HPO4 + H2O (2)0.5y2yyTa co : So mol NaOH : x + 2y = 2.57 x 1.43 = 3.67Khoi lng hon hp 2 muoi : 120x + 142y = 286.15Giai ra ta c : x = 0.52(mol) , y = 1.57(mol)Khoi lng cua muoi NaH2PO4 = 0.52 x 120 = 62.64 (gam)Khoi lng cua muoi Na2HPO4 = 1.57x142 = 223.508 (gam)
BAI TAP 156
Cho 128.226 gam P2O5 tac dung vi 2.364 lt dung dch KOH 3.24 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;K=39;H=1)
BAI GIAI
So mol P2O5 = 128.226/142 = 0.903(mol)So mol KOH =2.364x3.24 = 7.66(mol)So mol KOH/So mol P2O5 = 8.483 >= 6 =>Co 1 muoi sinh ra la : K3PO4P2O5 + 6KOH = 2K3PO4 + 3H2OTa co : So mol K3PO4 = 2 x so mol P2O5 = 2 x 0.903 = 1.806(mol)Khoi lng muoi K3PO4 = 1.806x212 = 382.872(g)
BAI TAP 157
Hap thu 22.85 lt kh CO2 o dktc vao 10.912 lt dung dch KOH 0.57 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;K=39;H=1)
BAI GIAI
So mol CO2 = 22.85/22.4 = 1.02(mol)So mol KOH =10.912x0.57 = 6.22(mol)So mol KOH/So mol CO2 = 6.098 >= 2 =>Co 1 muoi sinh ra la : K2CO32KOH + CO2 = K2CO3 + H2OTa co : So mol K2CO3 = so mol CO2 = 1.02(mol)Khoi lng muoi K2CO3 = 1.02x138 = 140.76(gam)
BAI TAP 158
Hap thu 5.6 lt kh SO2 o ktc vao 1.198 lt dung dch KOH 3.78 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)
BAI GIAI
So mol SO2 = 5.6/22.4 = 0.25(mol)So mol KOH =1.198x3.78 = 4.53(mol)So mol KOH/So mol SO2 = 18.12 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 0.25(mol)Khoi lng muoi K2SO3 = 0.25x158 = 39.5(gam)
BAI TAP 159
Hap thu 32.883 lt kh SO2 o ktc vao 0.875 lt dung dch KOH 3.83 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)
BAI GIAI
So mol SO2 = 32.883/22.4 = 1.468(mol)So mol KOH =0.875x3.83 = 3.35(mol)So mol KOH/So mol SO2 = 2.282 >= 2 =>Co 1 muoi sinh ra la : K2SO32KOH + SO2 = K2SO3 + H2OTa co : So mol K2SO3 = so mol SO2 = 1.468(mol)Khoi lng muoi K2SO3 = 1.468x158 = 231.944(gam)
BAI TAP 160
Hap thu V lt kh SO2 o dktc vao 0.067 lt dung dch KOH 4.94 M thu c 31.072 gam 2 muoi KHSO3 va K2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;K=39;H=1)
BAI GIAI
Goi x la so mol cua KHSO3 , y la so mol cua K2SO3KOH + SO2 = KHSO3 (1)x xx2KOH + SO2 = K2SO3 + H2O (2)2yyyTa co : So mol KOH : x + 2y = 0.067 x 4.94 = 0.33Khoi lng hon hp 2 muoi : 120x + 158y = 31.072Giai ra ta c : x = 0.122(mol) , y = 0.104(mol)Khoi lng cua muoi KHSO3 = 0.122 x 120 = 14.64 (gam)Khoi lng cua muoi K2SO3 = 0.104x158 = 16.432 (gam)
BAI TAP 161
Hap thu 5.578 lt kh CO2 o dktc vao 0.489 lt dung dch NaOH 3.33 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 5.578/22.4 = 0.249(mol)So mol NaOH =0.489x3.33 = 1.63(mol)So mol NaOH/So mol CO2 = 6.546 >= 2 =>Co 1 muoi sinh ra la : Na2CO32NaOH + CO2 = Na2CO3 + H2OTa co : So mol Na2CO3 = so mol CO2 = 0.249(mol)Khoi lng muoi Na2CO3 = 0.249x106 = 26.394(gam)
BAI TAP 162
Cho 80.514 gam P2O5 tac dung vi 0.466 lt dung dch KOH 2.19 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;K=39;H=1)
BAI GIAI
So mol P2O5 = 80.514/142 = 0.567(mol)So mol KOH =0.466 x 2.19 = 1.02(mol)0 = < So mol KOH/So mol P2O5 = 1.799 Co 1 muoi sinh ra la : KH2PO4P2O5+ 2KOH + +H2O = 2KH2PO4Ta co : So mol KH2PO4 = so mol KOH = 1.02(mol)Khoi lng muoi KH2PO4 = 1.02x136 = 138.72(gam)
BAI TAP 163
Cho m gam P2O5 tac dung vi 11.64 lt dung dch NaOH 0.59 M thu c 535.89 gam 2 muoi NaH2PO4 va Na2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaH2PO4 , y la so mol cua Na2HPO4P2O5 + 2NaOH +H2O = 2NaH2PO4 (1)0.5x xxP2O5 + 4NaOH = 2Na2HPO4 + H2O (2)0.5y2yyTa co : So mol NaOH : x + 2y = 11.64 x 0.59 = 6.87Khoi lng hon hp 2 muoi : 120x + 142y = 535.89Giai ra ta c : x = 0.98(mol) , y = 2.94(mol)Khoi lng cua muoi NaH2PO4 = 0.98 x 120 = 117.84 (gam)Khoi lng cua muoi Na2HPO4 = 2.94x142 = 418.048 (gam)
BAI TAP 164
Hap thu V lt kh CO2 o dktc vao 0.33 lt dung dch NaOH 3.48 M thu c 78.846 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaOH + CO2 = Na2CO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.33 x 3.48 = 1.149Khoi lng hon hp 2 muoi : 84x + 106y = 78.846Giai ra ta c : x = 0.58(mol) , y = 0.285(mol)Khoi lng cua muoi NaHCO3 = 0.58 x 84 = 48.636 (gam)Khoi lng cua muoi Na2CO3 = 0.285x106 = 30.21 (gam)
BAI TAP 165
Hap thu 2.867 lt kh SO2 o ktc vao 0.508 lt dung dch NaOH 4.13 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 2.867/22.4 = 0.128(mol)So mol NaOH =0.508x4.13 = 2.1(mol)So mol NaOH/So mol SO2 = 16.406 >= 2 =>Co 1 muoi sinh ra la : Na2SO32NaOH + SO2 = Na2SO3 + H2OTa co : So mol Na2SO3 = so mol SO2 = 0.128(mol)Khoi lng muoi Na2SO3 = 0.128x126 = 16.128(gam)
BAI TAP 166
Hap thu V lt kh SO2 o dktc vao 0.143 lt dung dch NaOH 2.57 M thu c 25.562 gam 2 muoi NaHSO3 va Na2SO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho S=32;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHSO3 , y la so mol cua Na2SO3NaOH + SO2 = NaHSO3 (1)x xx2NaOH + SO2 = Na2SO3 + H2O (2)2yyyTa co : So mol NaOH : x + 2y = 0.143 x 2.57 = 0.368Khoi lng hon hp 2 muoi : 104x + 126y = 25.562Giai ra ta c : x = 0.058(mol) , y = 0.155(mol)Khoi lng cua muoi NaHSO3 = 0.058 x 104 = 6.032 (gam)Khoi lng cua muoi Na2SO3 = 0.155x126 = 19.53 (gam)
BAI TAP 167
Hap thu 37.99 lt kh SO2 o ktc vao 1.052 lt dung dch KOH 3.05 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)
BAI GIAI
So mol SO2 = 37.99/22.4 = 1.696(mol)So mol KOH =1.052x3.05 = 3.21(mol)1 < So mol KOH/So mol SO2 = 1.893 < 2 =>Co 2 muoi sinh ra la : KHSO3 K2SO3KOH + SO2 = KHSO3(1)x xx2KOH + SO2 = K2SO3 + H2O(2)2yyyGoi x la so mol cua SO2(1) va y la so mol cua SO2(2)Ta co : So mol SO2 : x+y = 1.696So mol KOH : 2x + y = 3.21Giai ra ta c : x= 0.182 (mol) , y = 1.514 (mol)Khoi lng muoi KHSO3 = 0.182x120 = 21.84(gam)Khoi lng muoi K2SO3 = 1.514x158 = 239.212(gam)
BAI TAP 168
Hap thu 42.403 lt kh SO2 o ktc vao 0.1 lt dung dch NaOH 4.4 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;Na=23;H=1)
BAI GIAI
So mol SO2 = 42.403/22.4 = 1.893(mol)So mol NaOH =0.1x4.4 = 0.44(mol)0 < So mol NaOH/So mol SO2 = 0.232 Co 1 muoi sinh ra la : NaHSO3NaOH + SO2 = NaHSO3Ta co :So mol NaHSO3 = so mol NaOH = 0.44(mol)Khoi lng muoi NaHSO3 = 0.44x104 = 45.76(gam)
BAI TAP 169
Cho 87.756 gam P2O5 tac dung vi 7.046 lt dung dch NaOH 1.08 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)
BAI GIAI
So mol P2O5 = 87.756/142 = 0.618(mol)So mol NaOH =7.046x1.08 = 7.61(mol)So mol NaOH/So mol P2O5 = 12.314 > = 6 => Co 1 muoi sinh ra la : Na3PO4P2O5 + 6NaOH = 2Na3PO4 + 3H2OTa co : So mol Na3PO4 = 2 x so mol P2O5 = 2 x 0.618 = 1.24(mol)Khoi lng muoi Na3PO4 = 1.24x164 = 202.7(gam)
BAI TAP 170
Cho 219.39 gam P2O5 tac dung vi 0.61 lt dung dch NaOH 2.54 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)
BAI GIAI
So mol P2O5 = 219.39/142 = 1.545(mol)So mol NaOH =0.61x2.54 = 1.55(mol)0 = < So mol NaOH/So mol P2O5 = 1.003 Co 1 muoi sinh ra la : NaH2PO4P2O5 + 2NaOH +H2O = 2NaH2PO4Ta co : So mol NaH2PO4 = so mol NaOH = 1.55(mol)Khoi lng muoi NaH2PO4 = 1.55x120 = 186(gam)
BAI TAP 171
Hap thu 29.77 lt kh CO2 o dktc vao 0.355 lt dung dch NaOH 5.33 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho C=12;O=16;Na=23;H=1)
BAI GIAI
So mol CO2 = 29.77/22.4 = 1.329(mol)So mol NaOH =0.355x5.33 = 1.89(mol)1 < So mol NaOH/So mol CO2 = 1.422 < 2 =>Co 2 muoi sinh ra la : NaHCO3 Na2CO3NaOH + CO2 = NaHCO3(1)xx x2NaOH + CO2 = Na2CO3 + H2O(2)2y yyGoi x la so mol cua CO2(1) va y la so mol cua CO2(2)Ta co : So mol CO2 : x+y = 1.329So mol NaOH : 2x + y = 1.89Giai ra ta c : x= 0.768 (mol) , y = 0.561 (mol)Khoi lng muoi NaHCO3 = 0.768x84 = 64.512(gam)Khoi lng muoi Na2CO3 = 0.561x106 = 59.466(gam)
BAI TAP 172
Cho 29.962 gam P2O5 tac dung vi 625.159 gam dung dch NaOH 15.74 %. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;Na=23;H=1)
BAI GIAI
So mol P2O5 = 29.962/142 = 0.211(mol)So mol NaOH =625.159x15.74 = 2.46(mol)So mol NaOH/So mol P2O5 = 11.659 > = 6 => Co 1 muoi sinh ra la : Na3PO4P2O5 + 6NaOH = 2Na3PO4 + 3H2OTa co : So mol Na3PO4 = 2 x so mol P2O5 = 2 x 0.211 = 0.42(mol)Khoi lng muoi Na3PO4 = 0.42x164 = 69.21(gam)
BAI TAP 173
Cho 45.582 gam P2O5 tac dung vi lt dung dch NaOH thu c 88.44 gam 2 muoi NaH2PO4 va Na2HPO4.Hay xac nh khoi lng moi muoi sinh ra ?(Cho P=31;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaH2PO4 , y la so mol cua Na2HPO4P2O5 + 2NaOH +H2O = 2NaH2PO4 (1)0.5x xxP2O5 + 4NaOH = 2Na2HPO4 + H2O (2)0.5y2yyTa co : So mol P2O5 : 0.5x + 0.5y = 45.582 /142 = 0.321Khoi lng hon hp 2 muoi : 120x + 142y = 88.44Giai ra ta c : x = 0.12(mol) , y = 0.52(mol)Khoi lng cua muoi NaH2PO4 = 0.12 x 120 = 14.88 (gam)Khoi lng cua muoi Na2HPO4 = 0.52x142 = 73.556 (gam)
BAI TAP 174
Hap thu 40.342 lt kh SO2 o ktc vao 0.53 lt dung dch KOH 5.23 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ?(Cho S=32;O=16;K=39;H=1)
BAI GIAI
So mol SO2 = 40.342/22.4 = 1.801(mol)So mol KOH =0.53x5.23 = 2.77(mol)1 < So mol KOH/So mol SO2 = 1.538 < 2 =>Co 2 muoi sinh ra la : KHSO3 K2SO3KOH + SO2 = KHSO3(1)x xx2KOH + SO2 = K2SO3 + H2O(2)2yyyGoi x la so mol cua SO2(1) va y la so mol cua SO2(2)Ta co : So mol SO2 : x+y = 1.801So mol KOH : 2x + y = 2.77Giai ra ta c : x= 0.832 (mol) , y = 0.969 (mol)Khoi lng muoi KHSO3 = 0.832x120 = 99.84(gam)Khoi lng muoi K2SO3 = 0.969x158 = 153.102(gam)
BAI TAP 175
Cho 35.5 gam P2O5 tac dung vi 1.491 lt dung dch KOH 5.28 M. Hay xac nh muoi sinh ra va khoi lng muoi sinh ra ? (Cho P=31;O=16;K=39;H=1)
BAI GIAI
So mol P2O5 = 35.5/142 = 0.25(mol)So mol KOH =1.491x5.28 = 7.87(mol)So mol KOH/So mol P2O5 = 31.48 >= 6 =>Co 1 muoi sinh ra la : K3PO4P2O5 + 6KOH = 2K3PO4 + 3H2OTa co : So mol K3PO4 = 2 x so mol P2O5 = 2 x 0.25 = 0.5(mol)Khoi lng muoi K3PO4 = 0.5x212 = 106(g)
BAI TAP 176
Hap thu V lt kh CO2 o dktc vao 1.938 lt dung dch NaOH 1.24 M thu c 152.19 gam 2 muoi NaHCO3 va Na2CO3 .Hay xac nh khoi lng moi muoi sinh ra ? (Cho C=12;O=16;Na=23;H=1)
BAI GIAI
Goi x la so mol cua NaHCO3 , y la so mol cua Na2CO3NaOH + CO2 = NaHCO3 (1)xx x2NaO