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The Chemical Educator

ISSN: 1430-4171 (electronic version)

Table of Contents

Abstract Volume 7 Issue 1 (2002) pp 40-46

Rationalizing Nonideal Results from Undivided-Cell Electrowinning Experiments

Michael D. Gernon* and Christine Trumpfheller

Atofina Chemicals, King of Prussia Research & Development Center, 900 First Avenue, King of Prussia, PA 19406
Received April 27, 2001. Accepted August 1, 2001

Published online: 1 February 2002

Abstract. The appropriate interpretation of mass-balance data from undivided-cell electrowinning experiments allows for the determination of some simple aspects of metal-cation speciation within the electrolysis solution. The data that needs to be collected is limited to the ratio of the amount of acid produced to the amount of metal removed from the solution. By analysis of a simplified model of the electrowinning experiment, the ability to use such data to determine certain limits of metal-cation speciation is demonstrated. The overall treatment is useful in demonstrating to chemistry students that significant conclusions can be drawn from easily collected data when the system under consideration is well-understood.

Key Words:  Laboratories and Demonstrations; general chemistry; electrowinning; metal-cation

(*) Corresponding author. (E-mail: Michael.Gernon@atofina.com)

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Issue date: February 1, 2002

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