阳极用镍、阴极用铁电解NiSO4,主要电解产物为( )。A.阴极有H2产生 B.阴极产生Ni和H2 C.阳极有O2产生 D.阳极Ni溶解,阴极Ni析出

作者: tihaiku 人气: - 评论: 0
问题 阳极用镍、阴极用铁电解NiSO4,主要电解产物为( )。
选项 A.阴极有H2产生 B.阴极产生Ni和H2 C.阳极有O2产生 D.阳极Ni溶解,阴极Ni析出
答案 D
解析 溶液中的阴离子移向阳极,而阳极的金属Ni更易失电子,从而阳极Ni溶解进入溶液;阳离子移向阴极,由于[Ni2+]大于[H+],所以阴极上Ni2+得电子还原为Ni析出。

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