Na2S2O3 Hg2+ , :
Hg2+ + 3 S2O32-+ 2 H+= HgS↓+ 3S + 2 SO42-+ H2O
. Na2S2O3. . ?
Co2+
, +2. Co (II) , - . , .
- ().
NH4SCN o2+ , :
o2++ 4 SCN-= [Co(SCN)4]2-
- . , . Fe3+. - - .
. o2+ NH4SCN, 0,5 . ? o2+ Fe3+ .
- .
KNO2, o2+ ( 4-5) (III) :
o2++ 7 NO2-+ 3K++ 2CH3COOH= K3[Co(NO2)6]↓ + NO ↑+ 2CH3COO- + H2O
o2+ . o2+.
. 2 KNO2. . ?
Ni2+
Ni (II). - , [Ni(OH2)6]2+ .
- ( ).
(I) Ni2+ 5-10 (II):
H
CH3 O O CH3
= N N = C
Ni
= N N = C
CH3 O O CH3
H
, .
, 3,2. Fe2+. Fe3+ - .
. ) . 8-9. ?
) Na2HPO4, . . Ni2+ . Na2HPO4 . , .
|
|
Cd2+
, +2. .
- .
H2S > 1 Cd2+ , . :
CdS↓ + 4HCI = H2CdCI4 + H2S↑
3CdS↓ + 2NO3- + 8 H+= 3 Cd2++ 2NO + 3S↓ + 4 H2O
. Cd2+ . . . .