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2020-08-16View Original

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Reply #22020-08-16
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Reply #32020-08-16
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Reply #42020-08-16
D、盐桥中的电解质不参加电池反应
Reply #52020-08-16
选 A. A、错误.盐桥的作用是传递离子,分子、电子不能通过盐桥流动. B、正确.盐桥通过传递离子,消除了两个半电池中的过剩电荷. C、正确.如果两个半电池中积累过剩电荷,电池反应会很快停止. D、正确.盐桥一般用KCl饱和溶液灌注,KCl不参加氧化还原反应.
Reply #62020-08-16
D 盐桥通常是装有琼胶的饱和氯化钾溶液的U形管,其作用是保持电中性和构成闭合回路。原电池反应时溶液中的离子得失电子,使得半电池中正电荷或负电荷偏多,盐桥中的离子扩散到两个半电池中,起到中和作用;同时在盐桥中产生电流,构成闭合回路,保证原电池反应的进行,即维持氧化还原反应的进行;盐桥中的电解质参与了电池反应
Reply #72020-08-17
本帖最后由 h20090630 于 2020-8-17 10:03 编辑 A 盐桥通常是装有琼胶的饱和氯化钾溶液的U形管,其作用是保持电中性和构成闭合回路。原电池反应时溶液中的离子得失电子,使得半电池中正电荷或负电荷偏多,盐桥中的离子扩散到两个半电池中,起到中和作用;同时在盐桥中产生电流,构成闭合回路,保证原电池反应的进行,即维持氧化还原反应的进行;盐桥中的电解质参与了电池反应。
Reply #82020-08-17
D、盐桥中的电解质不参加电池反应

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