| I | II | III | IV | V | VI | ||
| Na+, K+, NH4+ | Ag+, Pb2+, Hg22+ | Ba2+, Ca2+, Sr2+ | Al3+, Zn2+, Cr3+, Sn2+ | Fe3+, Fe2+, Mg2+, Mn2+ | Cu2+, Co2+, Ni2+, Hg2+, Cd2+ | ||
| 2 HCl | 2 H2SO4 25 | 2 NaOH | |||||
| +, Na+, NH4OH | AgCl, PbCl2, Hg2Cl2 | BaSO4, CaSO4, SrSO4 | Al(OH)3, Zn(OH)2, Fe(OH)3, Cu(OH)2, Co(OH)2, Cr(OH)3, Sn(OH)2, Mg(OH)2, Cd(OH)2, Ni(OH)2 HgO | ||||
| . NaOH | . NH4OH | ||||||
| [Al(OH)4]- [Zn(OH)4]2- [Cr(OH)4]- [Sn(OH)4]2- | Fe(OH)3 Fe(OH)2 Mg(OH)2 Mn(OH)2 | [Cu(NH3)4]2+ [Co(NH3)4]2+[[Ni(NH3)4]2+ [Hg(NH3)4]2+ [Cd(NH3)4]2+ | |||||
1
u2+, Fe3+, Pb2+ Ba2+ -
, u2+, Fe3+, Pb2+ Ba2+ - .
_______________, Cu2+ ( ) Fe3+ ( ).
, , .
- :
2+, 
, 
, 
, ( ).
1. 2. HCl 2- . :
Pb2+ + 2Cl- = PbCl2
. , PbCl2, () u2+, Fe3+ Ba2+.
2. 2. H2SO4 3- . :
Ba2+ + SO 
= BaSO4
, BaSO4, u2+ Fe3+.
3. u2+ Fe3+ 25%- NH4OH (), Fe3+ Fe(OH)3 - , u2+ .
25%- NH4OH: :
Fe3+ + 3NH4OH =Fe(OH)3 + 3NH4 + Cu2+ + 4NH4OH = [Cu(NH3)4]2+ + 4H2O
Fe(OH)3, [Cu(NH3)4]2+. .
2
