CuSO₄ + 2KOH = K₂SO₄ + Cu(OH)₂Cu²⁺ + SO₄²⁻ + 2K⁺ + 2OH⁻ = 2K⁺ + SO₄²⁻ + Cu(OH)₂Cu²⁺ + 2OH⁻ = Cu(OH)₂H₂SO₄ + 2KOH = K₂SO₄ + 2H₂O2H⁺ +SO₄²⁻ + 2K⁺ + 2OH⁻ = 2K⁺ + SO₄²⁻ + 2H₂O2H⁺ + 2OH⁻ = 2H₂OZn + H₂SO₄ = ZnSO₄ + H₂Zn⁰ + 2H⁺ + SO₄²⁻ = Zn²⁺ + SO₄²⁻ + H₂⁰Zn⁰ + 2H⁺ = Zn²⁺ + H₂⁰Na₂O + H₂SO₄ = Na₂SO₄ + H₂ONa₂O + 2H⁺ + SO₄²⁻ = 2Na⁺ + SO₄²⁻ + H₂ONa₂O + 2H⁺ = 2Na⁺ + H₂O2KOH + CO₂ = K₂CO₃ + H₂O2K⁺ + 2OH⁻ + CO₂ = 2K⁺ + CO₃²⁻ + H₂O2OH⁻ + CO₂ = CO₃²⁻ + H₂ONa₂O + CO₂ = Na₂CO₃Zn + 2KOH + 2H₂O = K₂[Zn(OH)₄] + H₂Zn + 2K⁺ + 2OH⁻ + 2H₂O = 2K⁺ + [Zn(OH)₄]²⁻ + H₂Zn + 2OH⁻ + 2H₂O = [Zn(OH)₄]²⁻ + H₂