Решение
CoCl2+(NH4)2S = CoS↓ + 2NH4Cl
Co+2 + 2Cl- + 2(NH4)+ + S-2 = CoS↓ + 2NH4+ + 2Cl-
Co+2 + S-2 = CoS↓
NiSO3↓ + H2SO4 = NiSO4 + H2SO3
NiSO3↓ + 2H+ + SO4-2 = Ni+2 + SO4-2 + 2H+ +SO3-2
NiSO3↓ = Ni+2 +SO3-2
Решение
CoCl2+(NH4)2S = CoS↓ + 2NH4Cl
Co+2 + 2Cl- + 2(NH4)+ + S-2 = CoS↓ + 2NH4+ + 2Cl-
Co+2 + S-2 = CoS↓
NiSO3↓ + H2SO4 = NiSO4 + H2SO3
NiSO3↓ + 2H+ + SO4-2 = Ni+2 + SO4-2 + 2H+ +SO3-2
NiSO3↓ = Ni+2 +SO3-2