下列物质的水溶液能导电,但属于非电解质的是(     ) A.CH3COOH   

下列物质的水溶液能导电,但属于非电解质的是(     )

A.CH3COOH                 B.Cl2       C.NH4HCO3                                   D.SO2

答案

答案:D

[解析] 选项中的四种物质水溶液都能导电,但原因有所不同。CH3COOHNH4HCO3均为电解质,水溶液理应能导电;Cl2SO2水溶液能导电,是因为它们与水反应Cl2H2O=HClHClOSO2H2O=H2SO3,因生成物均为电解质,故溶液也导电。电解质和非电解质都是化合物,Cl2是单质,既不是电解质也不是非电解质。因此只有SO2为非电解质。失误分析:该题易把非电解质与不是电解质两个概念混淆,从而误认为CH3COOHNH4HCO3均为电解质,而Cl2SO2都不是电解质,那就是非电解质,而误选BD

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