Analysis of a Superconductor: Development of a Practical Exam for the International Chemistry Olympiad

Autor/inn/en	Nick, Sabine; Nather, Christian
Titel	Analysis of a Superconductor: Development of a Practical Exam for the International Chemistry Olympiad
Quelle	In: Journal of Chemical Education, 84 (2007) 12, S.1951-1954 (4 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
Schlagwörter	Chemistry; Test Construction; Science Tests; Competition; Electronics; International Programs; Experiments; Secondary School Students; Foreign Countries; Germany + Suchen Sie Ihr Suchwort? Chemie; Testaufbau; Wettkampf; Elektronik; Erprobung; Sekundarschüler; Ausland; Deutschland
Abstract	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.) (As Provided).
Anmerkungen	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
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10