4Al + 3O₂ = 2Al₂O₃
Al₂O₃ + 6HCl = 2AlCl₃ + 3H₂O
Al₂O₃ + 6H⁺ + 6Cl⁻ = 2Al³⁺ + 6Cl⁻ + 3H₂O
Al₂O₃ + 6H⁺ = 2Al³⁺ + 3H₂O
AlCl₃ + 3KOH = Al(OH)₃ + 3HCl
Al³⁺ + 3Cl⁻ + 3K⁺ + 3OH⁻ = Al(OH)₃ + 3H⁺ + 3Cl⁻
Al³⁺ + 3OH⁻ = Al(OH)₃
2Al(OH)₃ = Al₂O₃ +3H₂O (t)
Al₂O₃ + 2NaOH = 2NaAlO₂ + H₂O
Al₂O₃ + 2Na⁺ + 2OH⁻ = 2Na⁺ + 2AlO₂⁻ + H₂O
Al₂O₃ + 2OH⁻ = 2AlO₂⁻ + H₂O