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  Home > JCE Print > Journal of Chemical Education > Issues > 1995  > August  >
Laboratory Experiments
Construction and Testing of a Variable Temperature Potentiometry Cell for Student Use
Lee Kresge and Kenneth E. Hyde
State University of New York, College at Oswego, NY 13126

Donald A. Palmer
Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, P. O. Box 2008, Building 4500S, Oak Ridge, TN 37831-6110

Cover
August 1995
Vol. 72 No. 8
p. 756
Abstract
The design and construction of two versatile submersible potentiometric cells for student use over the temperature range 0 to 100 oC is reported. The cells are tested configured as chloride concentration cells with fabricated Ag/AgCl electrodes. For comparison purposes, a commercial chloride specific-ion electrode and double junction reference electrode in a commercial (Metrohm) cell is evaluated under similar conditions. The experiments verify Nernstian behavior for all electrode-cell combinations over the temperature ranges investigated. Student found slopes from the Nernst titrations in both the commercial and fabricated cells at different temperatures are reported. The average Nernst slopes for each electrode type (commercial vs. fabricated Ag/AgCl) agree well with each other at temperatures where measurement overlap. Thus the performance of all cells is comparable but only the fabricated cell design is useful at the highest temperatures.
More Information
*  Citation
 Kresge, Lee; Hyde, Kenneth E.; Palmer, Donald A. J. Chem. Educ. 1995 72 756.
*  Keywords
*  History
 Created:
Last Updated:		 10/1/1999
5/22/2006
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