- H6n hop X phan ling v6i Br2:
29. AMIN, AMINOA XIT, PROTEIN 1 Dap an dung la C.
Dat CTPT cua a - amino axit la : H 2 N r-C^Hy -COOH .
Phuong trinh phan ling :
H 2 N - C^Hy - COOH + HCl C I H 3 N - CxHy - COOH. 1 mol X tac dung v6i HCl kh6'i luong tang 36,5 gam.
a mol X tac dung vdri HCl khÓi lugng tang 13,95 - 10,3 = 3,65 gam. 10 3 -> a = 0,1 mol -> Mx = = 103 dvC. 12x + y + 16 + 45 = 103 -> X = 3 , y = 6. CTPT cua X la : H 2 N - C 3 H 6 - COOH. CTCT ciia X la : C H 3 - CH2 - CHCNHj) - COOH . 29.2. Cdng thurc diing la D. 8 9 Mx = 89 = - r r = mol. 89 HNaOH = 0.1.1,5 = 0,15 mol.
Chât X phan ling vdi NaOH nSn c6 thé la:
- Amino axit c6 CTPT la: HjNCHjCHjCOOH. - Este cua amino axit c6 CTPT Ik: H.NCH^COOCH,.
0,1 mol X + 0,1 mol NaOH 0,1 mol mudi Ỵ Con du 0,15 - 0,1 = 0,05 mol NaOH
-> my = 11,7-(0,05.40) = 9,7 gam.
My = — = 97, ling CTPT HsNCH^COONạ 0,1
Vay CTCT thu gon ciia X la: H 2 N C H 2 C O O C H 3 .
29.3. Dap s6' diing la C. Phuong trinh phan iJng:
C 6 H 5 N H 2 + NaNOz + 2HC1 ^ C 6 H 5 N 2 C I + NaCl + HjO
S6 mol C 6 H 5 N H 2 = s6' mol NaNOz
= sd'mol C 6 H 5 N 2 C I = = 0,1 (mol).
19.4. Dap an dung la D.
Dat CTPT cua amino axit X la: H j N - Q H ^ - COOH. Phuong trinh phan iJng:
H2N - C,Hy - COOH + NaOH -> H^N - C,Hy - COONa + H^Ọ 19,4-15 „
"x = -^^:r—— = 0,2 ( m o l ) ; Mx = ^ = 75. 2 3 - 1 ' ^ 0,2 16 + 12x + y + 45 = 75 -> X = 1, y = 2. CTCT cua X la: H j N - CHj - COOH.
""29.5. Dap an dung la B. 1 R7
nx = = 0,02 (mol)
Hop chat hiru co X la muÓi ciia axit cacboxylic don chiic va goc amin don churc.
Khi tac dung vdi NaOH, tao thanh 0,02 mol mu6'i C^H^COONạ Ta c6 : (12x + y + 44 + 23)0,02 = 1,64
]2x + y = 15 -> X = 1, y = 3.
Cong thiic cáu tao cua X la CH3COO-NH,CH3. . Dap an diing la D.
. Dap an diing la B.
SÓ mol benzen = — - = 2 (mol). 78
Tir 2 mol C^H^ di^u chédirge 1,2 mol C(iH,N02.
Tir 1,2 mol C^HsNOj dieu che dugc 0,6 mol CgH^NHj. "^c„H,NH, = 0,6.93 = 55,8 (gam).
Dap an dung la C.
Amin X la amin bac I : Loai dap an A va D.
Xet dap an B va C (diu la amin don chiic, bac I , phan tix c6 3 nguyen tir C).
^ Khi dÓt chay V lit hoi amin X cho 0,5 V lit khi N2, 3 V l i t khi C O 2 va 4,5 V lit hoi H.O (= 8 V lit). Dap an C phu hgfp.
Dap an diing la D.
Dat CTPT cua amin la C J i / N H j ) , . - Khi a = 1: Giai ra tháy v6 l i .
- Khi a = 2: SÓ mol amin = =0,12 (mol). 2.36,5
^9.8
[29.9,
- > M _ = — = 7 4 .
12x + y + 32 = 74 -> X = 3, y = 6: phii hop. CTPT cua amin la: H2NCH2CH2CH2NH2. CTPT cua amin la: H2NCH2CH2CH2NH2.
29.10. Dap an diing la D.