2Al+6HCl->2AlCl3+3H2, 2AlCl3+3H2SO4->Al2(SO4)3+3Cl2+3H2, Al2(SO4)3+6NaOH->2Al(OH)3+3Na2SO4, 2Al(OH)3<->Al2O3+3H2O
2Al+6HCl->2AlCl3+3H2, 2AlCl3+3H2SO4->Al2(SO4)3+3Cl2+3H2, Al2(SO4)3+6NaOH->2Al(OH)3+3Na2SO4, 2Al(OH)3<->Al2O3+3H2O