BAỉI TAP VE NHOM, CROM, KEếM
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 ựa 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
+ +


6.

( )
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 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
+ →

( ) ( )
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