NH₄OH + HCl = NH₄Cl + H₂O;
NH₄⁺ + OH⁻ + H⁺ + Cl⁻ = NH₄⁺ + Cl⁻ + H₂O;
OH⁻ + H⁺ = H₂O.
FeCl₃ + 3NaOH = Fe(OH)₃↓ + 3NaCl;
Fe⁺³ + 3Cl⁻ + 3Na⁺ + 3OH⁻ = Fe(OH)₃↓ + 3Na⁺ + 3Cl⁻;
Fe⁺³ + 3OH⁻ = Fe(OH)₃↓.
AgNO₃ + HCl = AgCl↓ + HNO₃;
Ag⁺ + NO₃⁻ + H⁺ + Cl⁻ = AgCl↓ + H⁺ + NO₃⁻;
Ag⁺ + Cl⁻ = AgCl↓.