AlCl3 + 3NaOH = Al(OH)3 + 3NaClAl³⁺ + 3Cl⁻ + 3Na⁺ + 3OH⁻ = Al(OH)3 + 3Na⁺ + 3Cl⁻Al³⁺ + 3OH⁻ = Al(OH)3MgO + H2SO4 = MgSO4 + H2OMgO + 2H⁺ + SO4²⁻ = Mg²⁺ + SO4²⁻ + H2OMgO + 2H⁺ = Mg²⁺ + H2OH2SO4 + 2NaOH = Na2SO4 + 2H2O2H⁺ + SO4²⁻ + 2Na⁺ + 2OH⁻ = 2Na⁺ + SO4²⁻ + 2H2O2H⁺ + 2OH⁻ = 2H2OH⁺ + OH⁻ = H2O