ESTE

Cu 1. Cht c cng thc C2H5COOCH=CH2 .C tn gi l?

Cu 2. Cht c cng thc CH2=C(CH3)-COOC2H5 .C tn gi l?

Cu 3. Cht c cng thc CH2=CH-OOC-C6H5 .C tn gi l?

Cu 4. Cht c cng thc C6H5-OOC-C6H5 .C tn gi l?

Cu 5. Vit cng thc ca Benzyl axetat, Benzyl fomat.

Cu 6. Cht c cng thc CH3COO(CH2)2CH(CH3)2C tn gi l?Cu 7. Cht c cng thc HCOOCH=CH2 .C tn gi l?

Cu 8. Cht c cng thc CH2=CH-COOCH3 .C tn gi l?

Cu 9. Cht c cng thc CH2=C(CH3)-COOCH3 .C tn gi l?

Cu 10. Cht c cng thc CH3-COOC6H5 .C tn gi l?

Cu 11. Cht c cng thc CH2=CH-OOC-CH3 .C tn gi l?

Cu 12. Cht c cng thc CH2=CH-OOC-C2H5 .C tn gi l?

Dng t chy:

Cu 1. Cht X c cng thc C4H8O2 khi tc dng vi NaOH thu c C2H3O2Na. Tn gi X l?

Cu 2. t chy hon ton 7,4 gam este X thu c 6,72 lit CO2 v 5,4 gam H2O. Mt khc un nng 7,4 gam X vi NaOH d th thu c 3,2 gam ancol. Tn gi ca X l?Cu 3. t chy hon ton 13,2 gam 1 este no n chc thu c 13,44 lit CO2(ktc). Cng thc phn t ca este l?

A.C4H6O2.B.C3H6O2. C. C4H8O2. D. C3H8O2.

Cu 4. t chy hon ton 20 gam 1 este n chc c 1 ni i trong phn t. Dn ton b sn phm vo bnh ng Ca(OH)2. Thu c 100 gam kt ta. Cng thc phn t ca este l?

A. C4H6O2.B.C5H8O2. C. C4H8O2. D. C3H8O2.

Cu 5. t chy hon ton 8,8 gam 1 este no n chc thu c lng CO2ln hn lng H2O l 10,4 gam. Cng thc phn t ca este l

A. C4H6O2.B.C3H6O2. C. C4H8O2. D. C3H8O2.

Cu 6. t chy hon ton 11,1 gam 1 este n chc. Dn ton b sn phm vo bnh ng Ca(OH)2. Thu c 45 gam kt ta, khi lng bnh tng 27,9 gam . Cng thc phn t ca este l?

A. C4H6O2.B.C3H6O2. C. C4H8O2. D. C3H8O2.

Cu 7. t chy hon ton 9 gam 1 este n chc. Dn ton b sn phm vo bnh ng Ca(OH)2. Thu c 30 gam kt ta, khi lng dung dch gim 11,4 gam . Cng thc phn t ca este l?

A. C4H6O2.B.C5H8O2. C. C2H4O2. D. C3H8O2.

Cu 8. Hai este n chc X v Y l ng phn ca nhau. Khi ho hi 1,85 gam X, thu c th tch hi ng bng th tch ca 0,7 gam N2 (o cng iu kin). Cng thc cu to thu gn ca X v Y l A. C2H5COOCH3 v HCOOCH(CH3)2.B. HCOOC2H5 v CH3COOCH3.C.C2H3COOC2H5 v C2H5COOC2H3.D. HCOOCH2CH2CH3 v CH3COOC2H5.Cu 9. Hn hp X gm hai este no, n chc, mch h. t chy hon ton mt lng X cn dng va 3,976 lt kh O2 ( ktc), thu c 6,38 gam CO2. Mt khc, X tc dng vi dung dch NaOH, thu c mt mui v hai ancol l ng ng k tip. Cng thc phn t ca hai este trong X lA. C2H4O2 v C5H10O2.B. C2H4O2 v C3H6O2.

C. C3H4O2 v C4H6O2.D. C3H6O2 v C4H8O2.

Cu 10. Khi t chy hon ton mt este no, n chc th s mol CO2 sinh ra bng s mol O2 phn ng. Tn gi ca este lA. metyl fomiat.B.etylaxetat.C.metylaxetat.D. n-propyl axetat.

Cu 11. Khi t chy hon ton 2,24 lit (ktc) 2 este no, n chc hn km nhau 14 vc cn V lit oxi. Thu c 6,72 lit CO2 (ktc) v 5,4 gam H2O. Gi tr ca V l?Dng thy phn

Cu 1. Thy phn 12 gam metyl fomat bng 150ml NaOH 1M. C cn c m gam cht rn gi tr m l?

Cu 2. Thy phn 10,56 gam etyl axetat bng 150ml NaOH 1M. C cn c m gam cht rn gi tr m l?

Cu 3. Thy phn gam 27,2 gam phenyl axetat bng 200ml NaOH 1M. C cn c m gam cht rn gi tr m l?

Cu 4. Thy phn 7,4 gam 1 este n chc cn 100ml NaOH 1M. C cn c 8,2 gam cht rn. Tn gi ca este l?

A. etyl fomat.B. metyl axetat

C. etyl axetatD. etyl propionat

Cu 5. X phng ho 1,99 gam hn hp hai este bng NaOH thu c 2,05 gam mui ca mt axit cacboxylic v 0,94 gam hn hp hai ancol l ng ng k tip nhau. Cng thc ca hai este lA. CH3COOCH3 v CH3COOC2H5.B. C2H5COOCH3 v C2H5COOC2H5.

C. CH3COOC2H5 v CH3COOC3H7.D. HCOOCH3 v HCOOC2H5.

Cu 6. Thy phn 13,2 gam 1 este n chc cn 150ml KOH 1M. C cn c 10,2 gam cht rn. Tn gi ca este l?

A. etyl fomat.B. metyl axetat

C. etyl axetatD. etyl propionate

Cu 7. Este n chc X c t khi hi so vi metan l 6,25. Cho 20 gam X tc dng vi 300 ml dung dch KOH 1M (un nng). C cn dung dch sau phn ng thu c 28 gam cht rn khan. Cng thc cu to ca X l?A. CH2=CH-CH2-COO-CH3.B. CH2=CH-COO-CH2-CH3.

C. CH3 -COO-CH=CH-CH3.D. CH3-CH2-COO-CH=CH2.

Cu 8. Este n chc X c t khi hi so vi oxi l 2,3125. Cho 8,88 gam X tc dng vi 150 ml dung dch NaOH 1M (un nng). C cn dung dch sau phn ng thu c 9,36 gam cht rn khan. Cng thc cu to ca X l?

Cu 9. Cho 20 gam mt este X (c phn t khi l 100 vC) tc dng vi 300 ml dung dch NaOH 1M. Sau phn ng, c cn dung dch thu c 23,2 gam cht rn khan. Cng thc cu to ca X lA. CH2=CHCH2COOCH3.B. CH3COOCH=CHCH3.

C. C2H5COOCH=CH2.

D. CH2=CHCOOC2H5.

Cu 10. X l mt este no n chc, c t khi hi i vi metan l 5,5. Nu em un 2,2 gam este X vi dung dch NaOH (d), thu c 2,05 gam mui. Cng thc cu to thu gn ca X lA. HCOOCH2CH2CH3.B. HCOOCH(CH3)2.

C. C2H5COOCH3. D. CH3COOC2H5.

Cu 11. Khi t chy hon ton 4,4 gam cht hu c X n chc thu c sn phm chy ch gm 4,48 lt CO2 ( ktc) v 3,6 gam nc. Nu cho 4,4 gam hp cht X tc dng vi dung dch NaOH va n khi phn ng hon ton, thu c 4,8 gam mui ca axit hu c Y v cht hu c Z. Tn ca X lA. etyl axetat.

B. metyl propionat.

C. isopropyl axetat.

D. etyl propionat.

Cu 12. Khi t chy hon ton 9,62 gam cht hu c X n chc thu c sn phm chy ch gm 8,736 lt CO2 ( ktc) v 7,02 gam nc. Nu cho 7,4 gam hp cht X tc dng vi dung dch NaOH va n khi phn ng hon ton, thu c 8,2 gam mui ca axit hu c Y v cht hu c Z. Tn ca X lA. etyl axetat.B. metyl propionat. C. isopropyl axetat. D. etyl propionat.

Cu 13. Cht hu c X c cng thc phn t C5H8O2. Cho 5 gam X tc dng va ht vi dung dch NaOH, thu c mt hp cht hu c khng lm mt mu nc brom v 3,4 gam mt mui. Cng thc ca X lA. HCOOC(CH3)=CHCH3.B. CH3COOC(CH3)=CH2.

C. HCOOCH2CH=CHCH3.D. HCOOCH=CHCH2CH3.

Hiu sut ca phn ng

Cu 1. un nng 6,0 gam CH3COOH vi 6,0 gam C2H5OH (c H2SO4 lm xc tc, hiu sut phn ng este ho bng 50%). Khi lng este to thnh lA. 6,0 gam.B.4,4gam.C. 8,8 gam.D. 5,2 gam.

Cu 2. Hn hp X gm axit HCOOH v axit CH3COOH (t l mol 1:1). Ly 5,3 gam hn hp X tc dng vi 5,75 gam C2H5OH (c xc tc H2SO4 c) thu c m gam hn hp este (hiu sut ca cc phn ng este ho u bng 80%). Gi tr ca m lA. 10,12. B. 6,48.C. 8,10. D. 16,20.

Cu 3. un 12 gam axit axetic vi 13,8 gam etanol (c H2SO4 c lm xc tc) n khi phn ng t ti trng thi cn bng, thu c 11 gam este. Hiu sut ca phn ng este ho lA. 55%.

B. 50%.C. 62,5%.D. 75%.

Cu 4. Khi thc hin phn ng este ho 1 mol CH3COOH v 1 mol C2H5OH, lng este ln nht thu c l 2/3 mol. t hiu sut cc i l 90% (tnh theo axit) khi tin hnh este ho 1 mol CH3COOH cn s mol C2H5OH l (bit cc phn ng este ho thc hin cng nhit )A. 0,342.

B. 2,925.C. 2,412. D. 0,456.

Cc este c bit

Este n chc m phn ng NaOH t l 1:2 l este ca phenol.

Cu 1. Cho 13,6 gam phenyl axetat phn ng vi 200ml NaOH 1M. C cn c a gam cht rn. Gi tr a l?

Cu 2. Thy phn 10,32 gam vinyl axetat trong mi trng axit. Cho ton b sn phm phn ng vi AgNO3/NH3 Thu c a gam kt ta gi tr a l? (H=100%).

Cu 3. Thy phn 10,8 gam vinyl fomat trong mi trng axit. Cho ton b sn phm phn ng vi AgNO3/NH3 Thu c a gam kt ta gi tr a l? (H=100%).

Cu 4. Cho 0,1 mol este n chc X tc dng vi NaOH Cn 8 gam NaOH v tng khi lng sn phm hu c thu c l 18,4 gam. CTPT X l?

Cu 5. Cho 0,15 mol este n chc X tc dng vi NaOH. Cn 12 gam NaOH v tng khi lng sn phm hu c thu c l 29,7 gam. S ng phn ca X l ?

Cu 6. Cho 14,8 gam hn hp X gm etyl axetat v metyl fomat, phn ng vi 1 lng d AgNO3/NH3 ngi ta thu c 21,6 gam bc. phn trm khi lng etyl axetat l?

Cacbohidrat

1. phn ng oxi ha khng hon tonCu 1. Cho 27 gam glucoz phn ng vi AgNO3/NH3. Tnh khi lng amoni gluconat to thnh?Cu 2. Cho 21,6 gam glucoz phn ng vi AgNO3/NH3. Tnh khi lng amoni gluconat to thnh? V khi lng bc thu c?Cu 3. Cho 100ml dung dch glucoz cha r nng tc dng vi mt lng d AgNO3/NH3 thu c 3,24 gam Ag kt ta. Nng mol/l ca dung dch glucoz dng l?Cu 4. Cho 50ml dung dch glucoz cha r nng tc dng vi mt lng d AgNO3/NH3 thu c 2,16 gam Ag kt ta. Nng mol/l ca dung dch glucoz dng l?Cu 5. Ha tan 42,2 gam hn hp X gm fructoz v saccaroz vo nc c dung dch Y. Cho Y phn ng vi AgNO3/NH3. Thu c 21,6 gam bc. Thnh phn % khi lng ca saccaroz trong X l? Cu 6. Ha tan 70,2 gam hn hp X gm glucoz v saccaroz vo nc c dung dch Y. Cho Y phn ng vi AgNO3/NH3. Thu c 43,2 gam bc. Thnh phn % khi lng ca saccaroz trong X l?Cu 7. Chia 200 gam dung dch glucoz v fructoz. Phn 1 cho tc dng AgNO3/NH3 thu c 86,4 gam Ag. Phn 2 lm mt mu 35,2 gam brom. Nng ca glucoz ban u l?

Cu 8. Chia 300 gam dung dch glucoz v fructoz. Phn 1 cho tc dng AgNO3/NH3 thu c 43,2 gam Ag. Phn 2 lm mt mu 40 gam brom. Nng ca glucoz ban u l?Cu 9. Cho 34,2 g hn hp saccaroz c ln mantoz phn ng hon ton dd AgNO3/NH3 d thu c 0,216 g bc. tinh khit ca saccaroz lCu 10. Cho 51,3 g hn hp saccaroz c ln mantoz phn ng hon ton dd AgNO3/NH3 d thu c 1,62 g bc. tinh khit ca saccaroz l?Cu 11. Hn hp 6,12 gam glucoz v saccaroz khi phn ng vi AgNO3/NH3 thu c 3,24 gam bc. Khi lng saccaroz rong X l?Cu 12. Hn hp 52,2 gam glucoz v saccaroz khi phn ng vi AgNO3/NH3 thu c 21,6 gam bc. Khi lng saccaroz rong X l?

Cu 13. Chia m gam dung dch glucoz v fructoz. Cho tc dng AgNO3/NH3 thu c 43,2 gam Ag. Nu cho phn ng vi brom th mt mu 8 gam brom. Khi lng saccaroz l?2. phn ng thy phnCu 14. Thy phn 243 gam tinh bt vi hiu sut 75% . Khi lng glucoz thu c l?Cu 15. Thy phn 216 gam tinh bt vi hiu sut 80% . Khi lng glucoz thu c l?

Cu 16. Thy phn m gam saccaroz vi hiu sut 25% thu c 27 gam glucoz. Gi tr m l?Cu 17. Thy phn m gam mantoz vi hiu sut 60% thu c 450 gam glucoz. Gi tr m l?

Cu 18. Thy phn 3,42 gam saccaroz thu c dung dch X. Cho X phn ng ht vi AgNO3/NH3 thu c a gam Ag. Gi tr ca a l? Cu 19. Thy phn 42,75 gam saccaroz thu c dung dch X. Cho X phn ng ht vi AgNO3/NH3 thu c a gam Ag. Gi tr ca a l?Cu 20. Lng glucoz cn dng to ra 1,82 gam sobitol vi hiu sut 80% l?Cu 21. Lng glucoz cn dng to ra 27,3 gam sobitol vi hiu sut 60% l?

3. Phn ng ln menCu 22. Thy phn 40,5 gam xenluloz. em ton b sn phm ln men thnh ancol etylic. Bit hiu sut ca c qu trnh l 65%. Khi lng ancol thu c l?Cu 23.Thy phn 56,7 kilogam tinh bt . em ton b sn phm ln men thnh ancol etylic. Bit hiu sut ca c qu trnh l 60%. Khi lng ancol thu c l?

Cu 24. Thy phn 162 gam tinh bt . em ton b sn phm ln men thnh ancol etylic 460 . Bit hiu sut ca c qu trnh l 50%. Khi lng ring ancol l (0,8 g/ml). Th tch ancol etylic 460 l?

Cu 25.Thy phn 41,04 kg saccaroz . em ton b sn phm ln men thnh ancol etylic 460 . Bit hiu sut ca c qu trnh l 60%. Khi lng ring ancol l (0,8 g/ml). Th tch ancol etylic 460 l?

Cu 26. Thy phn m gam tinh bt sau ln men, dn ton b sn phm ln men vo Ca(OH)2 d th thu c 15 gam kt ta. Hiu sut ton qu trnh l 65%. Gi tr m l?

Cu 27. Thy phn m gam tinh bt sau ln men, dn ton b sn phm ln men vo Ba(OH)2 d th thu c 23,64 gam kt ta. Hiu sut ton qu trnh l 50%. Gi tr m l?Cu 28. Thy phn m gam tinh bt sau ln men, dn ton b sn phm ln men vo Ca(OH)2 d th thu c 15 gam kt ta. Hiu sut ton qu trnh l 65%. Gi tr m l?Cu 29. Ln men m gam glucoz vi hiu sut 90%, lng kh CO2 sinh ra hp th ht vo dung dch nc vi trong, thu c 10 gam kt ta. Khi lng dung dch sau phn ng gim 3,4 gam so vi khi lng dung dch nc vi trong ban u. Gi tr ca m l

Cu 30. Ln men m gam glucoz vi hiu sut 80%, lng kh CO2 sinh ra hp th ht vo dung dch nc vi trong, thu c 20 gam kt ta. Khi lng dung dch sau phn ng gim 11,2 gam so vi khi lng dung dch nc vi trong ban u. Gi tr ca m l4. phn ng to xenluloz trinitrat.Cu 31. Cho 24,3 kg xenluloz phn ng vi HNO3. Khi lng xenluloz trinitrat thu c l? Bit hiu sut l 75%?Cu 32. Cho 48,6 xenluloz phn ng vi HNO3. Khi lng xenluloz trinitrat thu c l? Bit hiu sut l 60%?

Cu 33. Cho m kg xenluloz phn ng vi HNO3. Thu c 74,25 kg xenluloz trinitrat .Bit hiu sut l 80%. Khi lng xenluloz ban u l?

Cu 34. Cho m kg xenluloz phn ng vi HNO3. Thu c 35,64 kg xenluloz trinitrat .Bit hao ht 20%. Khi lng xenluloz ban u l?

Cu 35. Cho m kg xenluloz phn ng vi V ml HNO3 1M . Thu c 29,7 kg xenluloz trinitrat .Bit hao ht 20%. Gi tr ca V v m l?

Cu 36. Cho m kg xenluloz phn ng vi V ml HNO3 1M . Thu c 29,7 kg xenluloz trinitrat .Bit hiu sut 50%. Gi tr ca V v m l?

Bi tp v nhCho 50ml dung dch glucoz cha r nng tc dng vi mt lng d AgNO3 trong dung dch NH3 thu c 2,16 gam Ag kt ta. Nng mol/l ca dung dch glucoz dng lCu 1: Lng glucoz cn dng to ra 1,82 gam sobitol vi hiu sut 80% lCu 2: Cho s chuyn ho: Glucoz X Y CH3COOH. Hai cht X, Y ln lt lCu 3: Khi lng ca tinh bt cn dng trong qu trnh ln men to thnh 5 lt ru (ancol) etylic 46 l (bit hiu sut ca c qu trnh l 72% v khi lng ring ca ru etylic nguyn cht l 0,8 g/ml)Cu 4: Ln men hon ton m gam glucoz thnh ancol etylic. Ton b kh CO2 sinh ra trong qu trnh ny c hp th ht vo dung dch Ca(OH)2 (d) to ra 40 gam kt ta. Nu hiu sut ca qu trnh ln men l 75% th gi tr ca m lCu 5: Cho m gam tinh bt ln men thnh ancol (ru) etylic vi hiu sut 81%. Ton b lng CO2 sinh ra c hp th hon ton vo dung dch Ca(OH)2, thu c 550 gam kt ta v dung dch X. un k dung dch X thu thm c 100 gam kt ta. Gi tr ca m l Cu 6: Ln men m gam glucoz vi hiu sut 90%, lng kh CO2 sinh ra hp th ht vo dung dch nc vi trong, thu c 10 gam kt ta. Khi lng dung dch sau phn ng gim 3,4 gam so vi khi lng dung dch nc vi trong ban u. Gi tr ca m lCu 7: T 16,20 tn xenluloz ngi ta sn xut c m tn xenluloz trinitrat (bit hiu sut phn ng tnh theo xenluloz l 90%). Gi tr ca m lCu 8: Th tch ca dung dch axit nitric 63% (D = 1,4 g/ml) cn va sn xut c 59,4 kg xenluloz trinitrat (hiu sut 80%) lCu 9: Xenluloz trinitrat c iu ch t xenluloz v axit nitric c c xc tc axit sunfuric c, nng. c 29,7 kg xenluloz trinitrat, cn dng dung dch cha m kg axit nitric (hiu sut phn ng t 90%). Gi tr ca m lCu 10: Th tch dung dch HNO3 67,5% (khi lng ring l 1,5 g/ml) cn dng tc dng vi xenluloz to thnh 89,1 kg xenluloz trinitrat l (bit lng HNO3 b hao ht l 20 %)Cu 11: Thy phn 1 kg sn cha 20% tinh bt trong mi trng axithiu sut phn ng 85%. Lng glucoz thu c l

Cu 12: Th tch dd HNO3 67,5% (khi lng ring l 1,5 g/ml) cn dng tc dng vi xenluloz to thnh 89,1 kg xenluloz trinitrat l (bit lng HNO3 b hao ht l 20 %)Cu 13: Ln men m g glucoz vi hiu sut 90%. Lng CO2 sinh ra c hp th vo dd Ca(OH)2 thu c 10 g kt ta v khi lng dd gim 3,4 g. Gi tr ca m l

Cu 14: Thy phn hon ton 62,5 g dd saccaroz 17,1% trong mi trng axit (va ) c dd X. Cho dd AgNO3/NH3 vo X un nh c m g Ag. Gi tr ca m l

Cu 15: Cho 34,2 g hn hp saccaroz c ln mantoz phn ng hon ton dd AgNO3/NH3 d thu c 0,216 g bc. tinh khit ca saccaroz l

Cu 26: Thy phn 324 g tinh bt, hiu sut ca phn ng l 75%, khi lng glucoz thu c l

Cu 27: Cho m g glucoz v fructoz tc dng vi lng d dd AgNO3/NH3 to ra 43,2 g Ag. Cng m g hn hp ny tc dng va ht vi 8 g Br2 trong dd. S mol glucoz v fructoz trong hn hp ny ln lt l

Cu 28: c 29,7 kg xenluloz trinitrat, cn dng dd cha m kg axit nitric (hiu sut phn ng t 90%). Gi trca mCu 7. Sp xp nhit si tng dn?

Metyl propionat, ancol isopropylic, axit metacrylic, axetanhit, axit oxalic.

Cu 8. ng vi cng thc C4H6O2 c bao nhiu ng phn este?

Cu 9. ng vi cng thc C5H10O2 c bao nhiu ng este tham gia phn ng trng bc?

Cu 10. ng vi cng thc C3H6O2 c bao nhiu ng phn tc dng vi NaOH?

Cu 11. Phn ng thy phn trong mi trng axit v trong mi trng kim khc nhau nh th no? Cho v d?

Cu 12. Vit phng trnh iu ch phenyl axetat?

Cu 13. t chy hon ton 6 gam mt este X thu c 4,48 lt kh CO2(ktc) v 3,6 gam H2O. Cng thc phn t ca X l?

Cu 14. t chy hon ton 8,88 gam 1 este no n chc thu c 6,48 g H2O. S ng phn ca este l?

Cu 15. t chy hon ton 7,2 gam 1 este no n chc thu c lng CO2ln hn lng H2O l 6,24 gam. Cng thc phn t ca este l

Cu 16. t chy hon ton 10,56 gam 1 este n chc. Dn ton b sn phm vo bnh ng Ca(OH)2. Thu c 48 gam kt ta, khi lng bnh tng 29,76 gam. Cng thc phn t ca este l?

Cu 17. t chy hon ton 12,24 gam 1 este no n chc cn 17,472 lit O2(ktc) . Cng thc phn t ca este l

Cu 18. t chy hon ton 11,1 gam 1 este n chc. Dn ton b sn phm vo bnh ng Ca(OH)2. Thu c 45 gam kt ta, khi lng bnh gim 17,1 gam . Cng thc phn t ca este l?

Cu 19. Khi t chy hon ton 3,36 lit (ktc) 2 este no, n chc hn km nhau 14 vc cn V lit oxi. Thu c 13,2g CO2 v 5,4 gam H2O. Gi tr ca V l?Cu 20. thy phn gam 13,6 gam phenyl axetat bng 200ml KOH 1M. C cn c m gam cht rn gi tr m l?

Cu 21. Thy phn 8,8 gam 1 este n chc cn 100ml NaOH 1M. C cn c 8,2 gam cht rn. Tn gi ca este l?

Cu 22. X phng ho hon ton 13,4 gam hn hp hai este bng dung dch NaOH thu c 6,8 gam mui ca mt axit cacboxylic v 7,8 gam hn hp hai ancol l ng ng k tip nhau. Cng thc ca hai este l?Cu 23. Este n chc X c t khi hi so vi Heli l 18,5. Cho 8,88 gam X tc dng vi 150 ml dung dch NaOH 1M (un nng). C cn dung dch sau phn ng thu c 9,36 gam cht rn khan. Cng thc cu to ca X l?Cu 24. Khi t chy hon ton 7,2 gam cht hu c X n chc thu c sn phm chy ch gm 10,56 gam CO2 ( ktc) v 5,376 lit hi nc (ktc). Nu cho 7,5 gam hp cht X tc dng vi NaOH thu c 8,5 gam mui ca axit hu c Y v cht hu c Z. Tn ca X l?Cu 25. Cho 20,4 gam phenyl axetat phn ng vi 300ml KOH 1M. C cn c a gam cht rn. Gi tr a l?

Cu 26. Thy phn 12,9 gam vinyl axetat trong mi trng axit. Cho ton b sn phm phn ng vi AgNO3/NH3 Thu c a gam kt ta gi tr a l? (H=100%).

Cu 27. Thy phn 8,64 gam vinyl fomat trong mi trng axit. Cho ton b sn phm phn ng vi AgNO3/NH3 Thu c a gam kt ta gi tr a l? (H=100%).

Cu 28. Cho 0,12 mol este n chc X tc dng vi NaOH. Cn 240ml NaOH 1M v tng khi lng sn phm hu c thu c l 23,76 gam. CTPT X l?

Cu 30. Thy phn 8,8 gam metyl propionat bng 150ml NaOH 1M. C cn c m gam cht rn gi tr m l?