2NaOH + SiO₂ = Na₂SiO₃ + H₂O↑ (реакция в расплаве)
2Na⁺ + 2OH⁻ + SiO₂ = 2Na⁺ + SiO₃²⁻ + H₂O
2OH⁻ + SiO₂ = SiO₃²⁻ + H₂O
NaOH + HNO₃ = NaNO₃ + H₂O
Na⁺ + OH⁻ + H⁺ + NO₃⁻ = Na⁺ + NO₃⁻ + H₂O
OH⁻ + H⁺ = H₂O
2NaOH + Al₂O₃ + 3H₂O = 2Na[Al(OH)₄]
2Na⁺ + 2OH⁻ + Al₂O₃ + 3H₂O = 2Na⁺ + 2[Al(OH)₄]⁻
2OH⁻ + Al₂O₃ + 3H₂O = 2[Al(OH)₄]⁻
2NaOH + ZnCl₂ = 2NaCl + Zn(OH)₂↓
2Na⁺ + 2OH⁻ + Zn²⁺ + 2Cl⁻ = 2Na⁺ + 2Cl⁻ + Zn(OH)₂
2OH⁻ + Zn²⁺ = Zn(OH)₂