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82问答网 > 电解池中电子不下水,那电子由外电源负极到电解池阴极,那怎样通过电解质溶液形成闭合回路呢？

电解池中电子不下水,那电子由外电源负极到电解池阴极,那怎样通过电解质溶液形成闭合回路呢？

2025-04-02 21:59:37

推荐回答（1个）

回答1：

其实分类成电源类是错的......这是电化学题目，很简单，以电解饱和氯化钠溶液为例；
溶液中有Na+，Cl-，H+，OH-；

首先Na+不参加反应，因为即使参加反应生成Na也会和水反应掉，OH-不参加反应，因为氢氧键很难拆开

所以是Cl-和H+参加反应。
电解池中阴极提供电子，所以H+从阴极获得电子生H2气体，Cl-在阳极失去电子形成Cl2气体，就相当于一根导线，电子从这根导线一端进入（H+吸收电子），从一端流出（Cl-失去电子）。懂了么？

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