A:铁与FeCl3溶液反应:2Fe+Fe3+=3Fe2+
B:Al2(SO4)3溶液中加入过量氨水:Al3++3 NH3·H2O=Al(OH)3↓+3NH4+
C:醋酸溶液与水垢中的Mg(OH)2反应:Mg(OH)2+2H+=Mg2++2H2O
D:向Ca(ClO)2溶液中通入足量CO2:Ca2++CO2+H2O=CaCO3↓+2H+
He is the last of the family; after his death the name will die .