World Journal of Chemical Education
ISSN (Print): 2375-1665 ISSN (Online): 2375-1657 Website: http://www.sciepub.com/journal/wjce Editor-in-chief: Prof. V. Jagannadham
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World Journal of Chemical Education. 2016, 4(6), 117-123
DOI: 10.12691/wjce-4-6-1
Open AccessArticle

Filter Paper Salt Bridge in Potentiometric Titrations: An Undergraduate Laboratory Chemical Education Article

G. Mallika Devi1, D. A. Padmavathi1, R. Sanjeev2 and V. Jagannadham1,

1Department of Chemistry, Osmania University, Hyderabad-500007, India

2Department of Chemistry, Geethanjali College of Engineering and Technology, Cheeryala, Rangareddy Dist., Telangana, India

Pub. Date: November 16, 2016

Cite this paper:
G. Mallika Devi, D. A. Padmavathi, R. Sanjeev and V. Jagannadham. Filter Paper Salt Bridge in Potentiometric Titrations: An Undergraduate Laboratory Chemical Education Article. World Journal of Chemical Education. 2016; 4(6):117-123. doi: 10.12691/wjce-4-6-1

Abstract

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 (Cr2O72-), 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.

Keywords:
salt bridge Filter paper salt bridge Potentionmetric titrations

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