Сa + 2HNO₃ = Ca(NO₃)₂ + H₂↑Сa + 2H⁺ + 2NO₃⁻ = Ca²⁺ + 2NO₃⁻ + H₂↑Сa + 2H⁺ = Ca²⁺ + H₂↑Mg + 2HCl = MgCl₂ + H₂↑Mg + 2H⁺ + 2Cl⁻ = Mg²⁺ + 2Cl + H₂↑Mg + 2H⁺ = Mg²⁺ +H₂↑CaO + 2HCl = CaCl₂ + H₂OCaO + 2H⁺ + 2Cl⁻ = Ca²⁺ + 2Cl⁻ + H₂OCaO + 2H⁺ = Ca²⁺ + H₂OBaO + 2HNO₃ = Ba(NO₃)₂ + H₂OBaO + 2H⁺ + 2NO₃⁻ = Ba²⁺ + 2NO₃⁻ + H₂OBaO + 2H⁺ = Ba²⁺ + H₂OH₂SO₄ + 2NaOH = Na₂SO₄ + 2H₂O
2H⁺ + SO₄²⁻ + 2Na⁺ + 2OH⁻ = 2Na⁺ + SO₄²⁻ + 2H₂O
2H⁺ + 2OH⁻ = 2H₂OMg(OH)₂ + 2HNO₃ = Mg(NO₃)₂ + 2H₂OMg(OH)₂ + 2H⁺ + 2NO₃⁻ = Mg²⁺ + 2NO₃⁻ + 2H₂OMg(OH)₂ + 2H⁺ = Mg²⁺ + 2H₂OBaCl₂ + H₂SO₄ = BaSO₄↓ + 2HClBa²⁺ + 2Cl⁻ + 2H⁺+ SO₄²⁻ = BaSO₄↓ + 2H⁺ + 2Cl⁻Ba²⁺ + SO₄²⁻ = BaSO₄↓Al(NO₃)₃ + Na₃PO₄ = AlPO₄↓ + 3NaNO₃Al³⁺ + 3NO₃⁻ + 3Na⁺ + PO₄ = AlPO₄↓ + 3Na⁺ + 3NO₃⁻Al³⁺ + PO₄ = AlPO₄↓