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标题：Filter Paper Salt Bridge in Potentiometric Titrations: An Undergraduate Laboratory Chemical Education Article
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作者：G. Mallika Devi ; D. A. Padmavathi ; R. Sanjeev 等
期刊名称：World Journal of Chemical Education
印刷版ISSN：2375-1665
电子版ISSN：2375-1657
出版年度：2016
卷号：4
期号：6
页码：117-123
DOI：10.12691/wjce-4-6-1
出版社：Science and Education Publishing
摘要：It is essential in an electrochemistry laboratory to use salt bridge in electrochemical cells while measuring the emf. This provides a means of eliminating “liquid junction potential” between two half cells. It was indicated laconically without any experimental details (https://en.wikipedia.org/wiki/Salt_bridge#cite_ref-1) that the salt bridges can also be made using laboratory filter paper soaking in a suitable inert salt solution. In this article we have made a detailed potentiometric experimental study on four representative titrations viz. strong acid (HCl) versus strong base (NaOH), weak acid (CH₃COOH) versus strong base (NaOH), ferrous iron (Fe²⁺) versus dichromate (Cr₂O₇^2-), and chloride ion (Cl^-) versus silver ion (Ag⁺) using filter paper salt bridge and compared the results with those obtained using Agar-Agar salt bridge.
关键词：salt bridge; Filter paper salt bridge; Potentionmetric titrations