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ERIC Number: EJ820894
Record Type: Journal
Publication Date: 2007-Dec
Pages: 4
Abstractor: As Provided
Reference Count: 10
ISBN: N/A
ISSN: ISSN-0021-9584
Analysis of a Superconductor: Development of a Practical Exam for the International Chemistry Olympiad
Nick, Sabine; Nather, Christian
Journal of Chemical Education, v84 n12 p1951-1954 Dec 2007
In July 2004 the 36th International Chemistry Olympiad was held in Kiel, Germany. Competition for medals included 236 students from 61 countries, accompanied by about 150 teachers and other mentors. During this Olympiad the students performed qualitative and quantitative analyses of a superconductor, based on lanthanum barium cuprate. In the quantitative determination the students assessed the lanthanum and copper content by complexometric and iodometric titration; the alkaline earth metal was identified by qualitative analysis. From these results, the formula of the superconductor could be calculated. New procedures were developed, which in contrast to classical procedures, did not require the use of toxic chemicals. We report on the development and the results of our practical task and the reasons why we chose it for the Olympiad. (Contains 2 figures, 1 scheme, 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: Elementary Secondary Education; Secondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Germany