D. axit axetic va axit propanoic '
m phan la 100%) Cho 16,8 ga bdt Fe vao Xtháy thoat ra khi NO (san phi khir duy
B: nha^t) va sau cac phan ung hoan toan thu dugc 22,7 gam chat rSn. Gia tri cia t la: • Ạ 2,00 B. 1,00 C.0,50 D. 0,25 • Ạ 2,00 B. 1,00 C.0,50 D. 0,25
Phdn loai va phifcmg phcip gitii iihaiih BT Hoa hoc 12 -Cu Thanh Toan
Cdu 96: HoS tan hét 10,1 gam h6n hop hai kim loai kiem thuoc 2 chu ky lifen tiep , vao n\s6c thu dirge 3 lít dung dieh c6 pH = 13. Hai kim loai ki6m la:
Ạ L i , N a B. K, Rb C. Na, K D. Rb, Cs
Cdu 97: Dot ehay hoan toan 2 lit h6n hop khi gom ankin X va hidrocacbon Y can dung 4,5 lit khi sinh ra 3 lit khi CO, (eac th^ tich khi do o cQng dieu kien nhiet do, ap suát). Cong thue phan tCr cua X va Y Idn luot la:
Ạ C2H2vaCH4 B. Q H , va C H 4 C. C3H4 va CH4 D. C3H4 va C^H^
Cdu 98: Dien phan v6\ cue tro, mang ngan x6'p h6n hofp dung dich g6m 2a mol
NaCl va a mol CUSO4, den khi catot xuát hien bot khi thi ngimg dien phan. Trong qua trinh dien phan tren, khi sinh ra 6 anot la:
ẠCU B . C U v a O . C. H , D. O,
Cdu 99: Cho 27,4 gam h6n hop M gom axit axetic va hai ancol don chiic dong dang ke tiep tac dung het v6\8 gam Na thu dugc 40,65 gam chat ran. Neu cho toan bo lucmg M tren phan ling vdri dung djch NaHCOj (du), ket thiic phan iJng sinh ra 6,72 lit CO2 (dktc). Cong thuc ciia hai ancol trong M la:
Ạ C2H5OH va C3H7OH B. CH,OH va C2H5OH ^
C. C3H5OH va C4H7OH D. C7H15OH va C 8 H , 7 0 H
Cdu 100: Cho cSn bang: N2 ( k ) + 3H2 (k)?z> 2NH3 ( k )
Khi tang nhiet d6 thi ti khoi cua h6n hop khi thu dugc so voi H , giam. Phat bieu
diing v6 can bang nay la:
Ạ Phan ling thuan toa nhiet, can bang chuyen dich theo chieu nghich khi tang nhiet dọ
B. Phan ling thuan thu nhiet, can bang chuyen djch theo chiSu thuan khi tang nhiet dọ
C. Phan urng nghjch thu nhia, can bang chuyen dich theo chi^u thuan khi tang nhiet dọ
D. Phan ling nghjch toa nhi6t, can bang chuyen djch theo chieu nghich khi tang nhiet dọ
Caul: Theobai ra: np,^o "=2,16/18 = 0,12(mol)
CH3COOCH = CH2 > 4CO2 + 3H2O
Vinyl axetat(x) -> 3x
CH3COOCH3 ) 3CO2 + 3H2O
y 3y
-nibXn-k ,7 HCOOC2H5 ) 3CO2 + 3H2O
Z - » 3Z
Cty TNHH Ml \< 7 / Khang Vu-t
. r3x + 3y + 3z=0,12 Ta C O he: <^ ^ Ta C O he: <^ ^ • [86x + 74y + 74z = 3,08 =>x + y + z = 0,04va 12x + 74(x + y + z) = 3,08 => 12x + 74.0,04 = 3,08 => 12x = 0,12 => x = 0,01 W A or x.100% 0,01.100%
v a y %n,i„y,3,„„ = = = 25% ^ . JDap an dung la D.
x + y + z 0,04 *'
Chu y; Cac chat tren c6 dac diem chung la c6 cung so nguyen tir H trong phan tir. du2: Xet cac bieu thiJc:
(a) : Sai vi X CO th^ la xicloankan n? f/ ^ _ O r i
(b) : Dung , (1) , " (c) :Dung (2)
(d) : Sai, VI dong phan phai c6 cung CTPT. Thi du M = 60 c6 CH3000H(C2H40,) ; C3HsO(CH3CH2CH20H; (CH3)2 CHOH;CH3CH20CH3) ...
(e) : Sai, vi phan ung hihi co thucmg cham. r , „
(f) :Sai,vi n , , , = 2 ^ , :;
Dap an dung la B.
Cdu 3: Theo bai ra: nco2 = 2,24/22,4 = 0 , l ( mol)
n K 2 C 0 3 = 0,1.0,2 = 0,02(mol); U K O H =0,1.X = 0,lx(mol) Ket tiia la BaC03 Ug^coj = 11,82/197 = 0,06(mol)
" " K 2 C O 3 < i B a C O j => CO phan u-ng tap ra K2CO3
~ ^ ' " C O 2 > " B a C 0 3 ~ " K 2 C O 3 => CO phan ling tao ra KHCO3
2 K 0 H + CO2 K2CO3 + H2O
2a <— a -> a KOH + C O j ^ K H C O j
b <- b b
K2CO3 + BaCl2 -> BaC03 i +2KC1
( a + 0,02) ^ (a+ 0,02) 3 + 0,02 = 0,06 a + b =0,1 Xh Ta CO he: < >a = 0,04; b = 0,06 ..^ 2a+ b 2.0,04 + 0,06 , , Vay: X = ^ _ = \ —= 1 , 4 0,1 0,1 Dap an dung la D.
Dap an diing la C.
k.í
Cdu 4: Cac kim loai kitm Xh6 (Be, Mg, Ca, . . . ) tac dung vdi niroc trong nhung dieu kien khac nhau:
+ Be: Khong tac dung
+ Mg: Chi tac dung khi a dang bot vdi hcri nu6c. + Ca, Sr, Ba: Tac dung voi nude a dieu kien thucfng. => Phat bleu C sal
Cdu 5. PTHH: