H2S Zn2+ 2,5. , :
Zn2+ + H2S+2CH3COO- = ZnS↓ + 2CH3COOH
. . . <1.
4. (II).
, , :
Zn(NO3)2 +Co(NO3)2 = CoZnO2 + 4NO2↑ + O2↑
Al3+ Co(NO3)2.
Sn () Sn (IV)
, +2 +4. .
, (II).
E0Sn(IY) /Sn(11) =0,15 , Sn2+ - .
) . Bi3+ Sn2+ , :
Sn2+ + 4OH- = [Sn(OH)4]2-
3[Sn(OH)4]2- +2Bi3+ + 6OH- = 2Bi↓ + 3[Sn(OH)6]2-
Sn2+ . , . , Sn0:
2[Sn(OH)4]2- = [Sn(OH)6]2- + Sn↓ + 2OH-
. 3-4 Sn2+ 6-8 1-2 . .