上述各步转化的离子方程式如下:
(1)①Al3++3NH3·H2O===Al(OH)3↓+3NH,
②Al3++3AlO+6H2O===4Al(OH)3↓,
③Al3++3OH-===Al(OH)3↓;
(2)Al(OH)3+3H+===Al3++3H2O;
(3)Al3++4OH-===AlO+2H2O;
(4)AlO+4H+===Al3++2H2O;
(5)①AlO+CO2+2H2O===Al(OH)3↓+HCO, ②AlO+H++H2O===Al(OH)3↓;
(6)Al(OH)3+OH-===AlO+2H2O。