产生沉淀:Al2(SO4)3 + 6 NaOH = 2 Al(OH)3 ↓+ 3 Na2SO4Al3+ + 3 OH- = Al(OH)3 ↓溶解 :Al(OH)3 + NaOH = NaAlO2 + 2 H2O Al(OH)3 + OH- = AlO2- + 2 H2O
Al3+ +3OH-===Al(OH)3Al(OH)3 +OH-===AlO2- +2H2O
Al3++3OH-=Al(OH)3沉淀Al(OH)3+(OH)-=(AlO2)-2H2O