图8-2是电解Cu Cl2溶液的装置,其中c、d为石墨电极。则下列有关的判

图8-2是电解Cu Cl2溶液的装置,其中c、d为石墨电极。则下列有关的判断正确的是(    )

图8-2

A.a为负极、b为正极                            B.a为阳极、b为阴极

C.电解过程中,d电极质量增加               D.电解过程中,氯离子浓度不变

答案

解析:由电流方向可知:a为电源的正极,所以A、B都错;电解过程中,氯离子将在阳极放电,浓度减小,而金属铜将在电解池的阴极(d)析出,使其质量增大。

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