Al⇒Al2O3⇒AlCl3⇒Al(OH)3⇒Al2(SO4)3

Question

Al⇒Al2O3⇒AlCl3⇒Al(OH)3⇒Al2(SO4)3

Answer 1

1) 4Al + 3O₂ = 2Al₂O₃.
2) Al₂O₃ + 6HCl = 2AlCl₃ + 3H₂O.
3) AlCl₃ + 3NaOH = 3NaCl + Al(OH)₃.
4) 2Al(OH)₃ + 3H₂SO₄ = Al₂(SO₄)₃ + 6H₂O.