BAI TAP VE NHOM CROM KEM

BÀI TẬP VỀ NHÔM, CRÔM, KẼM
1.
4 3
4 3
o
t
Al C Al C
+ →
2.
( )
4 3 2 4 4 2 4
3
6 3 2Al C H SO CH Al SO+ → +
3.
( ) ( )
2 4 ùa du 2 4
3 3
6 2 3
v
Al SO NaOH Al OH Na SO
+ → ↓ +
4.
5.
( )
2 2
3
2NaAlO H O NaOH Al OH
+ +
ˆ ˆ †
‡ ˆ ˆ
6.

3 2
2 6 2 3Al HCl AlCl H
+ → +
7.
( )
3 3 2 4
3
3 3 3AlCl NH H O Al OH NH Cl
+ + → ↓ +
8.
( )
2 3 2
3
2 3
o
t
Al OH Al O H O
→ +
9.
2 3 2 2
2 2Al O NaOH NaAlO H O
+ → +
10.
2 3
2 3
o
t
Al S Al S
+ →
11.

( )
2 3 2 2
3
6 2 3Al S H O Al OH H S
+ → ↓ + ↑
12.
( ) ( ) ( )
2 2
3 2 2
2 4Al OH Ba OH Ba AlO H O
+ → +
13.
( ) ( )
2 2 2
2 2
2 2 3Al Ba OH H O Ba AlO H
+ + → + ↑
14.
2 2 3
3
2
2
o
t
Al O Al O
+ →
15.
3 6
2 3 2
3

2
2
dpnc
Na AlF
Al O Al O
→ +
16.
( ) ( )
2 3 2 2
2 2
Al O Ba OH Ba AlO H O
+ → +
17.
2 2 2
2 2 2 2 3Al NaOH H O NaAlO H
+ + → +
18.
3 6
2 3 2
3
2
2
dpnc
Na AlF
Al O Al O
→ +
19.
( ) ( )
2 2 2
2 2

2 2 3Al Ca OH H O Ca AlO H+ + → + ↑
20.
( ) ( )
2 2 2
2 3
2 2 2Ca AlO HCl H O Al OH CaCl
+ + → ↓ +
21.
( )
3 2
3
3 3Al OH HCl AlCl H O
+ → +
22.
( )
3 3 3
3
3 3AlCl AgNO Al NO AgCl
+ → + ↓
23.
3 2
3 2 2 3Mg AlCl Al MgCl
+ → +
24.
2
2 2
o
t
Zn O ZnO
+ →

Hoặc
2 2
o
t
Zn H O ZnO H
+ → + ↑
25.
2 2 2
ZnO NaOH Na ZnO H O+ → +
26.
( )
2 2 ùa du
2
2 2
v
Na ZnO HCl Zn OH NaCl
+ → ↓ +
27.
28.
( ) ( ) ( )
3 3
2 4 2
4Zn OH NH Zn NH OH
 
+ →
 
29.
2 2 2
2Zn NaOH Na ZnO H+ → + ↑
30.

( ) ( )
4 3 2 2
4 2
4 2Zn NH OH Zn NH OH H H O
 
+ → + ↑ +
 
31.
2 2 3
4 3 2
o
t
Cr O Cr O+ →
32.
2 3 2 2
2 2Cr O NaOH NaCrO H O
+ → +
33.
( )
2 2 2 3
3
2NaCrO CO H O Cr OH NaHCO
+ + → ↓ +
34.
35.
( )
2 3 2
3
2 3
o

t
Cr OH Cr O H O
→ +
36.
2 3 2 3
2 2
o
t
Cr O Al Al O Cr+ → +
37.
( )
3 2
3
3 3Cr OH HCl CrCl H O
+ → +
38.
2 3
2 3 2
o
t
Cr Cl CrCl+ →