下列离子方程式中正确的是（ ）
A．Al（OH）3滴加稀盐酸：OH-+H+=H2O
B．Fe片浸泡在FeCl3溶液中：Fe3++Fe=2Fe2+
C．NaHSO4溶液中加BaCl2溶液：SO42-+Ba2+=BaSO4↓
D．AlCl3溶液中滴加氨水：Al3++3OH-=Al（OH）3↓
A．Al（OH）3滴加稀盐酸的离子反应为Al（OH）3+3H+=3H2O+Al3+，故A错误；
B．Fe片浸泡在FeCl3溶液中的离子反应为2Fe3++Fe=3Fe2+，故B错误；
C．NaHSO4溶液中加BaCl2溶液的离子反应为SO42-+Ba2+=BaSO4↓，故C正确；
D．AlCl3溶液中滴加氨水的离子反应为Al3++3NH3．H2O=Al（OH）3↓+3NH4+，故D错误；
故选C．
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