AlCl3+3NaOH(少量)=Al(OH)3↓+3NaCl
AlCl3+3NaOH=Al(OH)3↓+3NaCl
NaOH+Al(OH)3=NaAlO2+2H2O
总:AlCl3+4NaOH(过量)=NaAlO2+3NaCl+H2O