下列离子方程式书写正确的是                         

下列离子方程式书写正确的是                            (    )

         A.金属铝溶于氢氧化钠溶液:Al+2OH=AlO2+H2

         B.碳酸钡中加入过量盐酸:CO32-+2H=CO2↑+H2O

         C.偏酸铝钠溶液中加入过量盐酸:AlO2+4H=Al3+2H2O

         D.铁粉加入到FeCl3溶液中:Fe+Fe3=2 Fe2

答案

C

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