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  Home > JCE Print > Journal of Chemical Education > Issues > 2001  > July  >
In the Classroom
Model for Teaching about Electrical Neutrality in Electrolyte Solutions
Tetsuo Morikawa
Department of Chemistry, Joetsu University of Education, Joetsu 943-8512, Japan

Bryce E. Williamson
Department of Chemistry, University of Canterbury, Christchurch, New Zealand

Cover
July 2001
Vol. 78 No. 7
p. 934
Abstract
A simple model, based on an 1853 experiment by J. W. Hittorf, is suggested as a tool for demonstrating the electrical neutrality condition in electrolyte solutions. An electrochemical cell is conceptually divided into compartments, between which ions migrate in accordance with their transport numbers. It is demonstrated that these changes occur with overall retention of macroscopic neutrality throughout the electrolyte solutions. The model should also help students to avoid misconceptions relating to other aspects of electrochemical cells, such as ionic conductance and reversibility.
More Information
*  Citation
 Morikawa, Tetsuo; Williamson, Bryce E. J. Chem. Educ. 2001 78 934.
*  Keywords
 Electrochemistry; Physical Chemistry; Teaching/Learning Theory/Practice; Thermodynamics
*  History
 Created:
Last Updated:		 June 6, 2001
August 31, 2005
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