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  Home > JCE Print > Journal of Chemical Education > Issues > 2004  > January  >
In the Laboratory
An Expeditious Experiment To Determine the Faraday Constant
M. Teresa S. R. Gomes, M. Manuela O. Oliveira, M. Arminda Fonseca, and João A. B. P. Oliveira
Department of Chemistry, University of Aveiro, 3810-104 Aveiro, Portugal
Cover
January 2004
Vol. 81 No. 1
p. 116
Abstract
This paper describes changes to the classical copper electrolysis experiment that reduce the deposition time. The most salient modification replaces metal strips with a piezoelectric quartz crystal with gold electrodes as the site where copper is deposited. Details of the equipment and experimental procedure used for the determination of the Faraday constant are provided. The numerical value obtained from a series of 36 experiments using two crystals with electrodes of different diameters was 96.6 ± 0.3 kC mol–1. The results obtained for the Faraday constant were not statistically different (α = 0.05) from the ones found in the literature for the classical experiment. The modifications proposed make this a simple, reliable experiment that is also affordable and yields results quickly.
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Instructions for the students, including prelaboratory discussion, laboratory handout, and laboratory report sheet, are available.
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*  Citation
 Gomes, M. Teresa S. R.; Oliveira, M. Manuela O.; Fonseca, M. Arminda; Oliveira, João A. B. P. J. Chem. Educ. 2004 81 116.
*  Keywords
 Electrochemistry; General Chemistry; Laboratory Equipment / Apparatus; Laboratory Instruction; Quantitative Analysis
*  History
 Created:
Last Updated:		 December 8, 2003
February 18, 2005
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