(1)AlCl3与NaOH反应---当OH-少量时生成Al(OH)3
AICI3 + 3NaOH == AI(OH)3 + 3NaCI
AI3+ + 3OH- == AI(OH)3
(2)AlCl3与NaOH反应---当OH-过量时生成NaAlO2
AICI3 + 4NaOH == NaAIO2 + 3NaCI + H2O
AI3+ + 4OH- == AIO- + H2O