选用作盐桥的物质应有什么原则？ -题库考试答案搜索网

选用作盐桥的物质应有什么原则？

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2021-12-30 08:49

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正确答案

选用作盐桥的物质应有什么原则：
①盐桥中离子的r+≈r-，t+≈t-，使Ej≈0。
②盐桥中盐的浓度要很高，常用饱和溶液。
③常用饱和KCl盐桥，因为K⁺与Cl^-的迁移数相近。作为盐桥的溶液不能与原溶液发生反应，当有Ag⁺时用KNO₃或NH₄NO₃。

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标签：物理学林学

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