2HCl + Ca(OH)₂ = CaCl₂ + 2H₂O
2H⁺ + 2Cl⁻ + Ca²⁺ + 2OH⁻ = Ca²⁺ + 2Cl⁻ + 2H₂O
H⁺ + OH⁻ = H₂O
Fe(OH)₂ + 2HNO₃ = Fe(NO₃)₂ + 2H₂O
Fe(OH)₂ + 2H⁺ + 2NO₃⁻ = Fe²⁺ + 2NO₃⁻ + 2H₂O
Fe(OH)₂ + 2H⁺ = Fe²⁺ + 2H₂O
2NaOH + CuCl₂ = Cu(OH)₂ + 2NaCl
2Na⁺ + 2OH⁻ + Cu²⁺ + 2Cl⁻ = Cu(OH)₂ + 2Na⁺ + 2Cl⁻
2OH⁻ + Cu²⁺ = Cu(OH)₂
K₂SO₃ + H₂SO₄ = K₂SO₄ + SO₂ + H₂O
2K⁺ + SO₃²⁻ + 2H⁺ + SO₄²⁻ = 2K⁺ + SO₄²⁻ + SO₂ + H₂O
SO₃²⁻ + 2H⁺ = SO₂ + H₂O