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ERIC Number: EJ832496
Record Type: Journal
Publication Date: 2009-Apr
Pages: 5
Abstractor: As Provided
Reference Count: 6
ISSN: ISSN-0021-9584
Hydrogen and Palladium Foil: Two Classroom Demonstrations
Klotz, Elsbeth; Mattson, Bruce
Journal of Chemical Education, v86 n4 p465-469 Apr 2009
In these two classroom demonstrations, students observe the reaction between H[subscript 2] gas and Pd foil. In the first demonstration, hydrogen and palladium combine within one minute at 1 atm and room temperature to yield the non-stoichiometric, interstitial hydride with formula close to the maximum known value, PdH[subscript 0.7]. In the process, palladium undergoes a noticeable color change and increase in brittleness. In the second classroom demonstration, the kinetics of H[subscript 2] uptake is determined and yields a zero-order rate law. Other observations are provided to guide students to conclude that the experimental conditions for the demonstration result in kinetics governed by H[subscript 2] mass transport. Both classroom demonstrations use the same simple apparatus, but otherwise are mutually independent. (Contains 4 figures and 7 notes.)
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:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; Postsecondary Education
Audience: Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A