电解精炼铜时,下列叙述不正确的是(    ) A.与电源正极相连的电极

电解精炼铜时,下列叙述不正确的是(    )

A.与电源正极相连的电极是粗铜板          B.阴极发生反应:Cu2++2e-Cu

C.电解池的阳极材料为纯铜薄片             D.粗铜板上发生氧化反应

答案

解析:电解精炼铜时,粗铜作阳极被溶解,发生氧化反应,纯铜作阴极,等待铜离子的析出发生还原反应,电解液为含有铜离子的盐(如CuSO4、CuCl2等),故答案为C项。

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