AlCl₃ + 3NaOH = Al(OH)₃↓ + 3NaCl; Al³⁺ + 3Cl⁻ + 3Na⁺ +3OH⁻ = Al(OH)₃↓ + 3Na⁺ + 3Cl⁻; Al³⁺ + 3OH⁻ = Al(OH)₃↓.