Al2(SO4) добить четирими способами
2Al + 3H₂SO₄ = Al₂(SO₄)₃ + 3H₂ Al₂O₃ + 3SO₃ (t)= Al₂(SO₄)₃ 2Al(OH)₃ + 3H₂SO₄ = Al₂(SO₄)₃ + 6H₂O 2Al(OH)₃ + 3SO₃ = Al₂(SO₄)₃ + 3H₂O