下列反应的离子方程式正确的是(    ) A.稀硫酸滴在银片上:2Ag+2

下列反应的离子方程式正确的是(    )

A.稀硫酸滴在银片上:2Ag+2H+2Ag++H2

B.稀硫酸与氢氧化钡溶液混合:

+Ba2+BaSO4

C.稀硝酸滴在大理石上:CaCO3+2H+Ca2++H2CO3

D.氧化铁与稀盐酸混合:Fe2O3+6H+2Fe3++3H2O

答案

思路解析:A项不符合反应事实,氢离子不将银氧化;B项中生成的水不能拆分;C项中碳酸不稳定,将分解成二氧化碳与水。

答案:D

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