Hn hp A gm 0,1 mol anehit metacrylic v 0,3 mol kh hiro
Hn hp A gm 0,1 mol anehit metacrylic v 0,3 mol kh hiro. Nung nng
hn hp A mt thi gian, c mt cht xc tc Ni, thu c hn hp hi B gm hn hp
cc ancol, cc anehit v hiro. T khi hi ca B so vi He bng 95/12. Hiu
sut ca phn ng hiro ha anehit metacrylic l:
Hp cht ion A c to nn t cc ion n nguyn t M2+v X2-. Tng s ht
(ntron, proton, electron) trong phn t A l 84, trong s ht mang in
nhiu hn s ht khng mang in l 28 ht. S ht mang in ca ion X2-t hn s ht
mang in ca ion M2+l 20 ht. V tr ca M trong bng tun hon l
t chy hon ton mt lng ancol X to ra 8,96 lit CO2(kc) v 9 gam H2O.
X tc dng vi Cu(OH)2to ra dung dch mu xanh lam. Oxi ha X bng CuO to
hp cht hu c a cht Y. Nhn xt no sau y ng vi X?
Cho 100 ml dung dch cha hn hp Ba(OH)21M v KOH2M vo 100 ml dung
dch cha hn hp NaHCO32M v NH4HCO31M. Sau khi phn ng xy ra hon ton,
un nng hn hp sau phn ng cho kh thot ra ht th khi lng dung dch sau
phn ng gim bao nhiu gam so vi tng khi lng hai dung dch tham gia phn
ng? (coi nh nc bay hi khng ng k).
Trn mt th tch H2vi mt th tch anken X thu c hn hp Y c th khi so
vi H2l 11. Cho Y vo bnh kn c cha sn mt t bt Ni th tch khng ng k.
Nung bnh mt thi gian ri a v nhit ban u th thu c hn hp Z c t khi so
vi H2l 55/3. Phn trm khi lng ca ankan trong Z l:
Ho tan 0,54 gam bt Al vo dung dch cha 0,015 mol Fe(NO3)3v 0,015
mol Cu(NO3)2. Kt thc phn ng thu c m gam rn. Gi tr ca m l
A cha (C , H, O, N) c 46,67 % N v MA< 100 . t 1,8 gam A cn
1,008 lit O2(kc). Sn phm chy gm N2, CO2, hi nc, trong t l th tch
CO2: th tch nc = 1: 2. Khi cho 1,8 gam A vo H2O d , thu c dung dch
B. Cho dung dch H2SO4d vo dung dch B ri dn ht kh vo bnh cha dung
dch KOH d. Sau th nghim thy khi lng cht tan trong bnh KOH lc sau
tng m gam. Gi tr m l :
t chy hon ton mt lng hn hp hai este n chc no, mch h cn 3,976 lt
oxi (ktc) thu c 6,38 gam CO2. Cho lng este ny tc dng va vi KOH thu
c hn hp hai ancol k tip v 3,92 gam mui ca mt axit hu c. Cng thc ca
hai cht hu c trong hn hp u l:
Cho 18 gam bt Mg vo 600 ml dung dch hn hp AgNO3x mol/l v
Cu(NO3)20,75x mol/l thu c dung dch X v 48,24 gam hn hp rn Y gm 3
kim loi. Ha tan ht hn hp Y vo dung dch HNO3long va thu c 8,4 lt NO
(ktc) v dung dch cha m gam mui. Gi tr ca m l
Nung m gam hn hp X gm KClO3v KMnO4thu c 11 gam cht rn Y v O2.
Trn lng O2trn vi khng kh theo t l th tch : = 1 : 3 trong mt bnh kn
ta thu c hn hp kh Z. Cho vo bnh 0,528 gam cacbon ri t chy ht
cacbon, sau khi cc phn ng xy ra hon ton thu c hn hp kh T gm 3 kh
O2, N2, CO2, trong CO2chim 22,92% th tch. Gi tr m l
Nung m gam hn hp X gm FeS v FeS2trong mt bnh kn cha khng kh (gm
20% th tch O2v 80% th tch N2) n khi phn ng xy ra hon ton, thu c cht
rn v hn hp kh Y c thnh phn th tch: N2= 84,77%; SO2= 10,6% cn li l
O2. Thnh phn % theo khi lng ca FeS trong X l
Cho 150 ml dung dch KOH 1,2M tc dng vi 100 ml dung dch AlCl3nng
xM, thu c dung dch Y v 4,68 gam kt ta. Loi b kt ta, thm tip 175 ml
dung dch KOH 1,2M vo Y, thu c 2,34 gam kt ta. Gi tr ca x l
ipeptit X, pentapeptit Y u mch h v cng c to ra t 1 amino axit
no, mch h trong phn t c 1 nhm -NH2v 1 nhm -COOH. Thu phn hon ton 16
gam X trong dung dch HCl d, lm kh cn thn dung dch sau phn ng thu c
25,1 gam cht rn. Vy khi t chy hon ton 0,2 mol Y th cn t nht bao
nhiu mol O2nu sn phm chy thu c gm CO2, H2O, N2?
Cho 32,8 gam hn hp gm axit glutamic v tyrosin (t l mol 1:1) tc
dng vi 500 ml dung dch NaOH 1M, phn ng hon ton thu c dung dch Y. C
cn cn thn dung dch Y thu c m gam cht rn khan. Gi tr ca m l
Cho hn hp gm 6,72 gam Mg v 0,8 gam MgO tc dng ht vi lng d dung
dch HNO3. Sau khi cc phn ng xy ra hon ton, thu c 0,896 lt mt kh X
(ktc) v dung dch Y. Lm bay hi dung dch Y thu c 46 gam mui khan. Kh
X l
X phng ha hon ton 100 gam cht bo c ch s axit bng 7 cn a gam dung
dch NaOH 25%, thu c 9,43 gam glixerol v b gam mui natri. Gi tr ca
a, b ln lt l:
t chy hon ton m gam hn hp benzen, axetylen, vinyl axetilen. Ton
b sn phm chy cho i t t qua bnh ng Ba(OH)2rn d, sau qua bnh P2O5d.
Kt thc th nghim thy khi lng bnh Ba(OH)2tng 6,36 gam. Gi tr ca m
l
Cho m gam hn hp bt X gm ba kim loi Zn, Cr, Sn c s mol bng nhau
tc dng ht vi lng d dung dch HCl long, nng thu c dung dch Y v kh H2.
C cn dung dch Y thu c 8,98 gam mui khan. Nu cho m gam hn hp X tc
dng hon ton vi O2(d) to hn hp 3 oxit th th tch kh O2(ktc) phn ng
l
Mt hn hp X gm 0,04 mol Al v 0,06 mol Mg. Ho tan hon ton hn hp ny
trong dung dch HNO3thu c 0,08 mol Y l sn phm ca s kh . Nu em hn hp
ho tan trong H2SO4c, nng th thu c 0,12 mol Z l sn phm ca s kh ca .
Y v Z l
Ha tan hon ton hn hp gm cc kim loi Mg, Al, Zn, Fe, Ni, Cu, Ag vo
dung dch HNO3long (d), thu c dung dch X. Cho X tc dng vi dung dch
NaOH (d), thu c kt ta Y. em Y tc dng vi dung dch NH3(d), n phn ng
hon ton thu c kt ta Z. S cht c trong Y v Z ln lt l
Hn hp X c C2H5OH, C2H5COOH, CH3CHO trong C2H5OH chim 50% theo s
mol. t chy m gam hn hp X thu c 3,06 gam H2O v 3,136 lt CO2(ktc). Mt
khc 13,2 gam hn hp X thc hin phn ng trng bc thy c x gam Ag kt ta.
Gi tr ca x l
Thi hi nc qua than nng thu c hn hp kh X kh (gm H2, CO, CO2). Cho
X qua dung dch Ca(OH)2th cn li hn hp kh Y kh (H2, CO). Ly mt phn kh
Y cho tc dng va ht vi 13,44 gam CuO thy to thnh 1,89 gam nc. Phn
trm th tch kh CO2trong X l
Ha tan ht m gam Al2(SO4)3vo H2O thu c 300 ml dung dch X. Cho 150
ml dung dch X tc dng vi dung dch cha 0,3 mol NaOH thu c 2a gam kt
ta. Cho 150 ml dung dch X cn li phn ng vi dung dch cha 0,55 mol
KOH, kt thc cc phn ng thu c a gam kt ta. Gi tr ca m v a ln lt l
Hn hp Z gm 1 axit no n chc X v 1 ancol no n chc Y, bit MX= MY. t
chy hon ton 0,2 mol hn hp Z, ton b sn phm chy c hp th bng dung dch
Ca(OH)2thy to ra 30 gam kt ta v dung dch Z. Thm dung dch NaOH d vo
Z thy to ra 13 gam kt ta mi. Cng thc ca X v Y ln lt l
Trn 100 ml dung dch FeCl21 M vi 300 ml dung dch AgNO31M. Khi phn
ng xy ra hon ton th khi lng kt ta thu c l
Oxi ho 25,6 gam CH3OH (c xc tc) thu c hn hp sn phm X. Chia X
thnh hai phn bng nhau: Phn 1 tc dng vi AgNO3d trong NH3un nng thu c
m gam Ag. Phn 2 tc dng va vi 100ml dung dch KOH 1M. Hiu sut qu trnh
oxi ho CH3OH l 75%. Gi tr ca m l
Cho a gam bt Fe vo 400 ml dung dch hn hp gm Cu(NO3)20,4M v
H2SO40,5M. Sau khi cc phn ng xy ra hon ton, thu c 0,8a gam hn hp bt
kim loi v V lt kh NO (sn phm kh duy nht, ktc). Gi tr ca a v V ln lt
l
Mt mui X c cng thc C3H10O3N2. Ly 17,08 gam X cho phn ng ht vi
200 ml dung dch KOH 2M. C cn dung dch sau phn ng thu c phn hi v cht
rn. Trong phn hi c mt cht hu c Y (bc I), trong phn rn ch l hn hp cc
cht v c. Khi lng ca phn rn l:
Oxi ho hon ton a gam hn hp Mg, Zn v Al thu c b gam hn hp oxit.
Cho hn hp kim loi trn tc dng vi lng d dung dch H2SO4thu c V lt kh
(ktc). V c gi tr tnh theo a, b l
Ha tan ht 2,72 gam hn hp X gm FeS2, FeS, Fe, CuS v Cu trong 500
ml dung dch HNO31M, sau khi kt thc cc phn ng thu c dung dch Y v
0,07 mol mt cht kh thot ra. Cho Y tc dng vi lng d dung dch BaCl2thu
c 4,66 gam kt ta. Mt khc, dung dch Y c th ha tan ti a m gam Cu. Bit
trong cc qu trnh trn, sn phm kh duy nht l NO. Gi tr ca m l
