1. Na₂CO₃=Na₂O+CO₂↑
2Na⁺+CO₃²⁻=Na₂O+CO₂↑
2. H₂SO₃=H₂O+SO₂↑
2H⁺+SO₃²⁻=H₂O+SO₂↑
3. 3NaOH+H₃PO₄=Na₃PO₄+3H₂O
3Na⁺+3OH⁻+3H⁺+PO₄³⁻=3Na⁺+PO₄³⁻+3H₂O
3OH⁻+3H⁺=3H₂O
4. Na₂CO₃+H₂SO₄=Na₂SO₄+H₂O+CO₂↑
2Na⁺+CO₃²⁻+2H⁺+SO₄²⁻=2Na⁺+SO₄²⁻+H₂O+CO₂↑
CO₃²⁻+2H⁺=H₂O+CO₂↑
5. 2NaOH+Ba(NO₃)₂⇄2NaNO₃+Ba(OH)₂
2Na⁺+2OH⁻+Ba²⁺+2NO₃⁻⇄2Na⁺+2NO₃⁻+Ba²⁺+2OH⁻
6. AgNO₃+HCI=AgCI↓+HNO₃
Ag⁺+NO₃⁻+H⁺+CI⁻=AgCI↓+H⁺+NO₃⁻
Ag⁺+CI⁻=AgCI↓
7. KOH+BaSO₄≠
8. Mg²⁺+2CI⁻+2Na⁺+2OH⁻=Mg(OH)₂↓+2Na⁺+2CI⁻
Mg²+2OH⁻=Mg(OH)₂↓