A:Cl2通入水中:Cl2+H2O=2H++Cl﹣+ClO﹣
B:铜丝插入稀硝酸:3Cu+8H++2NO3﹣=3Cu2++2NO↑+4H2O
C:向NaClO溶液中通入过量SO2:ClO﹣+SO2+H2O=HClO+HSO3﹣
D:向NaAlO2溶液中通入过量CO2:2AlO2﹣+CO2+3H2O=2Al(OH)3↓+CO32﹣
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