(1)4Al+3O2=点燃=2Al2O3
(2)2Al+6H+===3H2↑+2Al3+
(3)2Al+2OH-+2H2O===2AlO2-+3H2↑
(4)2Al2O3=电解=4Al+3O2↑
(5)Al2O3+6H+===2Al3++3H20
(6)Al2O3+2OH-===2AlO2-+H2O
(7)2Al(OH)3=加热=Al2O3+3H2O
(8)Al(OH)3+3H+===Al3+3H2O
(9)Al(OH)3+OH-===AlO2- +2H2O
(10)AlO2-+H++H2O===Al(OH)3 ↓
(11)Al3++3OH-===Al(OH)3 ↓
(12)KAl(SO4)2+3KOH===Al(OH)3↓+2K2SO4