в) NiS + H2O2 + HCl = NiCl2 + S + H2ONiS + 2H+ + 2e- = Ni2+ + S
д) CoS + H2O2 + CH3COOH = Co(CH3COO)2 + S + H2OCoS + 2H+ + 2e- = Co2+ + S
в) NiS + H2O2 + HCl = NiCl2 + S + H2O
NiS + 2H+ + 2e- = Ni2+ + S
д) CoS + H2O2 + CH3COOH = Co(CH3COO)2 + S + H2O
CoS + 2H+ + 2e- = Co2+ + S