2Al + 6H+ == 2Al3+ + 3H2↑
2Al + OH－ + H2O== 2AlO2－ + 3H2↑
Al3+ +4OH－== AlO2－ + 2H2O
Al3+ +3OH－== Al(OH)3↓
AlO2－ + 4H+ == Al3+ + 2H2O
AlO2－ + H+ + H2O == Al(OH)3↓
Al(OH)3 + 3H+ == Al3+ + 3H2O
Al(OH)3 + OH－ == AlO2－ + 2H2O
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