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ERIC Number: EJ1001195
Record Type: Journal
Publication Date: 2012-Jul
Pages: 4
Abstractor: As Provided
Reference Count: 6
ISBN: N/A
ISSN: ISSN-0021-9584
Understanding the Nernst Equation and Other Electrochemical Concepts: An Easy Experimental Approach for Students
Vidal-Iglesias, Francisco J.; Solla-Gullon, Jose; Rodes, Antonio; Herrero, Enrique; Aldaz, Antonio
Journal of Chemical Education, v89 n7 p936-939 Jul 2012
The goal of the present laboratory experiment is to deepen the understanding of the Nernst equation and some other concepts that are essential in electrochemistry. In this practical laboratory session, students first learn that the equilibrium potential of an electrode is related to the difference between two equilibrium inner electric potentials (also called Galvani potentials), namely, phi[subscript M] (inner electric potential of the metallic phase) and phi[subscript sol] (inner electric potential of the solution phase). Second, the concept of overvoltage is defined and the method to measure it is described. Finally, it is shown how and why the inner potential of a solution changes with the distance to the working electrode when a current flows through the solution and how the potential difference is distributed in an electrochemical cell when a current is flowing through it. (Contains 2 figures.)
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; Postsecondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A