Question

如何分离AlCl3和FeCl3混合溶液?写出有关离子方程式

Answer 1

额,刚才看错了

先加过量NaOH：Al3+ +3OH- ==Al(OH)3↓；Al(OH)3+OH- ==AlO2- +2H2O

总：Al3+ +4OH- ==AlO2- +2H2O

Fe3+ +3OH- ==Fe(OH)3↓

过滤出Fe(OH)3,加盐酸：Fe(OH)3+3H+ ==Fe3+ +3H2O

滤液中加过量HCl：AlO2-+H+ +H2O==Al(OH)3↓

Al(OH)3+3H+ ==Al3+ +3H2O

总：AlO2-+4H+ ==Al3+ +2H2O