Ba(OH)₂ + K₂CO₃ = BaCO₃↓ + 2KOH;
Ba²⁺ + 2OH⁻ + 2K⁺ + CO₃²⁻ = BaCO₃↓ + 2K⁺ + 2OH⁻;
Ba²⁺ + CO₃²⁻ = BaCO₃↓.
Al(NO₃)₃ + 3KOH = Al(OH)₃↓ + 3KNO₃;
Al³⁺ + 3NO₃⁻ + 3K⁺ + 3OH⁻ = Al(OH)₃↓ + 3K⁺ + 3NO₃⁻;
Al³⁺ + 3OH⁻ = Al(OH)₃↓.
BaBr₂ + Na₂SO₄ = BaSO₄↓ + 2NaBr;
Ba²⁺ + 2Br⁻ + 2Na⁺ + SO₄²⁻ = BaSO₄↓ + 2Na⁺ + 2Br⁻;
Ba²⁺ + SO₄²⁻ = BaSO₄↓.