1. AgNO₃+ NaCI=AgCl↓+NaNO₃
Ag⁺+NO₃⁻+ Na⁺+CI⁻=AgCl↓+Na⁺+NO₃⁻
Ag⁺ +Cl⁻ =AgCl↓
2. Zn(NO₃)₂+Na₂SO₃=ZnSO₃↓+2NaNO₃
Zn²⁺+2NO₃⁻+2Na⁺+SO₃²⁻=ZnSO₃↓+2Na⁺+2NO₃⁻
Zn²⁺+SO₃²⁻=ZnSO₃↓
