.
)
( ) PbCl2. . . .
, , IV .
)
,
b2+ + 2 = b()2
, ,
Pb(OH)2 + 2+ = b2+ + 22
b()2+ 2 = b22 + 22
N4 .
5 - 6 2 - 3 ( ). b()2 .
.
)
PbI2.
4 - 5 . , . . .
,
PbI2 + 2KI = K2[PbI4]
)
K2CrO4 Pb2+ . K2r27
2Pb2+ + r272 + 2 = 2PbCrO4 + 2+
,
, -
bCrO4 + 4Na = Na2CrO4 + Na2PbO2 + 22
4 - 5 3 - 4 ( ) ().
)
- . , .
(30%- )
2NH4CH3COO + 2PbSO4 = (NH4)2SO4 + [Pb(3)2PbSO4]
|
|
|
PbSO4 + 4 = 2PbO2 + K2SO4 + 22
)
3%- H2O2, . . , , , . 22. , . - 1:33 000.
3. [Hg2]2+
(I) -g-g-. [g2]2+, . (I) .
)
,
(I) g212, 1 . (I) , . (I)
g212+ 2NH4 = [NH2Hg2]1 + NH4Cl + 22
[NH2Hg2]1 NH4Cl, .
[NH2Hg2]1 = N2Hg1 + g
- [NH2Hg2]1 N2Hg1 - . . [g2]2+, (I).
)
N (I) g2O.
4 - 5 (I) 3 - 4 .
.
)
(I) , [NH2Hg2]+. , (. 3).
4 - 5 (I) 3 - 4 N4.
)
.
- (1). . , .
(II)
g2(N3)2 + Sn12 = g212 + Sn(NO3)2
g2Cl2 + Sn12 = 2g + SnCl4
4 - 5 (I) 3 - 4 (II). - .
)
I (I) - g2I2,
Hg2I2 = 2KI = Hg + K2[HgI4].
4 - 5 (I) - . .
|
|
|
)
2CrO4 Hg2CrO4 , .
4 - 5 (I) .
V . 4.3.
8
