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ERIC Number: EJ824962
Record Type: Journal
Publication Date: 2008-Feb
Pages: 3
Abstractor: As Provided
Reference Count: 15
ISBN: N/A
ISSN: ISSN-0021-9584
Surfactant Adsorption: A Revised Physical Chemistry Lab
Bresler, Marc R.; Hagen, John P.
Journal of Chemical Education, v85 n2 p269-271 Feb 2008
Many physical chemistry lab courses include an experiment in which students measure surface tension as a function of surfactant concentration. In the traditional experiment, the data are fit to the Gibbs isotherm to determine the molar area for the surfactant, and the critical micelle concentration is used to calculate the Gibbs energy of micelle formation. In the experiment described here, students fit their data to the Szyszkowski equation, allowing them to also calculate the Gibbs energy of surface adsorption. In addition, we use this experiment to introduce nonlinear custom curve fitting. (Contains 3 figures and 1 note.)
Division of Chemical Education of the American Chemical Society. Subscription Department, P.O. Box 1267, Bellmawr, NJ 08099-1267. Tel: 800-691-9846; Tel: 856-931-5825; Fax: 856-931-4115; e-mail: jchemed@egpp.com; Web site: http://www.jce.divched.org
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: Students; Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A