2Al(OH)₃ + 3H₂SO₄ = Al₂(SO₄)₃ + 6H₂O
2Al⁺³ + 6OH⁻ + 6H⁺ + 3SO₄⁻² = 2Al⁺³ + 3SO₄⁻² + 6H₂O
6OH⁻ + 6H⁺ = 6H₂O или ОН⁻ + Н⁺ = Н₂О
BaCl₂ + Na₂SO₄ = BaSO₄↓ + 2NaCl
Ba⁺² + 2Cl⁻ + 2Na⁺ + SO₄⁻² = BaSO₄↓ + 2Na⁺ + 2Cl⁻
Ba⁺² + SO₄⁻² = BaSO₄
HCl + NaOH = NaCl + H₂O
H⁺ + Cl⁻ + Na⁺ + OH⁻ = Na⁺ + Cl⁻ + H₂O
H⁺ + OH⁻ = H₂O