题目:
下列反应的离子方程式正确的是( )
A.过量的NaHSO4与Ba(OH)2反应:H++SO2-4+Ba2++OH-=BaSO4↓+H2O
B.向次氯酸钙溶液通入SO2:Ca2++2ClO-+SO2+H2O=CaSO3↓+2HC1O
C.用石墨作电极电解饱和NaCl溶液:Cl-+2H2O
Cl2↑+H2↑+OH-电解 . .
D.向C6H5ONa溶液中通入少量CO2:C6H5O-+CO2+H2O→C6H5OH+HCO-3
答案:
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