在100ml含等物质量的HBr和H2SO4溶液中通入0.01molCL2,有一半Br－变为Br2（已 知Br2能氧化H2SO3）.原溶液
A．0.075mol•L－1 B．0.008mol•L－1
C．0.75mol•L－1 D．0.08mol•L－1
人气：236 ℃ 时间：2020-04-10 01:59:09
解答
本题中,Br2还原SO4离子还有剩余.设浓度为X,则0.01molCL2提供0.02mol电子,SO4离子得到2Xmol电子,Br－得到X/2mol电子,根据电阻守恒,2.5*X=0.02,X=0.008mol,因为有100ml溶液,故选择D
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