L KIEN THlTC CAN NAM VfTNG
2. Hgp chat nao sau day khong phai la hgp
chat luong tinh ? A. Amoni axetic B. Axit a-glutamic C. Alanin
D. Anilin
3. CH3-CH(NH2)-COOH lin lugt tac dung voi cac dung dich chiia cac chat sau: HCl, NaOH, NaCl, NH3, CH3OH, NH2-CH2-COOH. / So phan umg co the xay ra la
A. 3 B.4 C. 5 D. 6 C. 5 D. 6
4. Dot chay bet a mol mot amino axit X dugc 2a mol CO2 va 0,5a mol N2. X la A. NH2-CH2-COOH.
B. X chiia 2 nhom -COOH trong phan tir. C. NH2-CH2-CH2-COOH.
D. X chiia 2 nhom -NH2 trong phan tir. 5. Hgp chat hiiu co A co cong thirc phan tir C3H9O2N. Cho A phan ling voi dung dich NaOH dun nhe, thu dugc muoi B va khi C lam xanh quy tim am. Nung B voi NaOH ran thu dugc mot hidrocacbon don gian nhit. Xac dinh cong thirc cau tao ciia A ? A. CH3COONH3CH3 B. CH3CH2COONH4 C. HCOONH3CH2CH3 D. HCOONH2(CH3)2 Hogt dgng cua HS 2. Chpn dap an D 3. Chpn dap an D
Co 5 chat phan ung dugc trir NaCl
4. Chgn dap an A
Imol X tao ra 2a CO2 —> X co 2 nguyen tir C
Imol X tao ra 0,5 a mol N2 —> X co 1 nguyen tir N vay chi co dap an A.
5. Chgn dap an A
Muoi B tac dung voi NaOH cho CH4 vay A chi co the la CH3C00Na vi A don chiic —> cong thirc ciia A la: CH3COONH3CH3
Hogt dgng cUa GV
6. Cho 44,1 gam axit glutamic tac dung voi 9,2 gam ancol etylic sau phan ling chi thu dugc mot san phim X chiia mot nhom chiic este. Tach X dem phan ling hoan toan voi NaOH thi thiy cin 200ml NaOH 0,8M. Vay hieu suat phan ung este boa la
A. 40,0% B. 32,0% C. 80,0% D. 53,3% C. 80,0% D. 53,3%
Hogt dgng cda HS
6. Phan ling este boa
HOCOC3H5(NH2)COOH+ C2H5OH ^=^ HOCOC3H5(NH2)COOC2H5
+ H2O Phan ling voi NaOH
HOCOC3H5(NH2)COOC2H5 + 2NaOH -^ NH2C3H5 (C00Na)2
+ C2H5OH + H2O Hieu suat phan ling este boa tinh theo etanol (chat thieu).
H = M ^ . 1 0 0 = 40%-
0,2 Dap an A
Hogt dgng 3
CUNG CO v A B A I T A P V E N H A GV nhac lai cac noi dung chinh da de cap trong bai luyen tap: Cong thiic cua amin, amino axit, protein.
Tinh chat hoa hpc ciia amin, amino axit, protein.
Su giong nhau va khac nhau ve tinh chat giiia amin, amino axit va protein. - Cac dang bai tap co ban.
GV yeu cau HS ve nha lam them cac bai tap sau:
3.1. Co cac dung dich sau: C6H5-NH3CI, H2N-CH2-CH2-CH(NH2)-COOH, ClH3N-CH2-COOH,HOOC-CH2-CH2-CH(NH2)-COOH,
H2N-CH2-COONa.
So lugng cac dung dich co pH < 7 la
A. 2 B.3 C.5 D . 4
Ddp dn B
3.2. Cho amino axit CH3-CH(NH2)-COOH. Chit nay co thi phan ling dugc voi chat nao sau day?
A.(CH3CO)20 B.AgN03/NH3 C. Ba(0H)2 D. Ca A, B, C
3.3. Tir 18 kg glyxin NH2CH2COOH ta co the tong hgp dugc protein voi hieu suat 76%) thi kbli lugng protein thu dugc la
A. 16,38 kg. B. 10,40 kg. C. 18,00 kg. D. 13,68 kg.
Ddp dn B
3.4. Cho 17,4 gam hon hgp 2 amin don chiic bac I c6 ti khoi so voi khong khi bang 2. Tac dung voi dung dich FeCl3 du thu dugc ket tiia, dem nung ket tua den khoi lugng khong doi dugc m gam chat ran. Gia tri cua m la
A. 16,0 gam B. 10,7 gam C. 24,0 gam D. 8,0 gam
Ddp dn D
3.5. Cho dung dich sau:
C6H5NH2 (X,); CH3NH2 (X2); H2N-CH2-COOH (X3); HOOC-CH2-CH2-CH(NH2)-COOH (X4);
H2N-(CH2)4-CH(NH2)-COOH (X5).
Nhirng dung dich lam quy tim chuyen thanh mau xanh la
A. X], X2 B. X3, X4 C. X2, X5 D. Xi, X2, X3, X4, X5
Ddp dn C
3.6. Hgp chat hiiu co X la este tao boi axit glutamic (axit a - amino glutaric) va mot ancol bac nhat. De phan img bet voi 37,8 gam X can 400 ml dung dich NaOH 1M. Cong thiic cau tao thu gpn cua X la
A. C2H3(NH2)(COOCH2-CH3)2 B. C3H5(NH2)(COOCH2-CH2-CH3)2 B. C3H5(NH2)(COOCH2-CH2-CH3)2