1. Zn(OH)2 + 2HCl = ZnCl2 + 2H2O
Zn(OH)2 + 2NaOH = Na2ZnO2 + 2H2O
2. б) BaO + H2O = Ba(OH)2
3. CaCO3 + 2HCl = CaCl2 + H2O + CO2
5. Al(OH)3 + 3KOH = K3AlO2 + 3H2O
6. NH3 + H2O = NH4OH
NH4OH + H3PO4 = NH4H2PO4 + H2O
7. CrCl3 + NaOH = Cr(OH)3↓ + 3NaCl
2Cr(OH)3 = Cr2O3 + 3H2O
Cr2O3 + 3H2SO4 = Cr2(SO4)3 + 3H2O
Cr2(SO4)3 + 6KOH = 2Cr(OH)3↓ + 3K2SO4
8.NiOH+, PO43-, Al(OH)2+, CuOH+, CO32-, FeOH2+, Cl-, Cr3+, H2PO4-.