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  Home > JCE Print > Journal of Chemical Education > Issues > 2005  > January  >
Chemistry for Everyone
JCE DigiDemos: Tested Demonstrations
Chemiluminescent Oscillating Demonstrations: The Chemical Buoy, the Lighting Wave, and the Ghostly Cylinder
Hernán E. Prypsztejn
Laborotorio de Química, Escuela Técnica N° 1 "Otto Krause", Buenos Aires, Argentina

checked by
Douglas R. Mulford
Department of Natural Science, Pepperdine University, Malibu, CA 90263-4321

Doug Stratton
Department of Chemistry, Onalaska High School, Onalaska, WI 54650

Cover
January 2005
Vol. 82 No. 1
p. 53
Abstract
Oscillating reactions have been extensively used in chemical demonstrations. They involve several chemical concepts about kinetics, catalysts, and thermodynamics. The spontaneous cyclic color change of a solution is an attraction in any educational-level course. Chemiluminescent reactions are also among the most fascinating demonstrations and have been successfully used as a pedagogical tool. In this article, a chemiluminescent oscillating reaction is presented in which a chemiluminescent substance (luminol) interacts with a chemical oscillator producing an oscillating chemiluminescence. This demonstration has been successfully performed in basic chemistry courses to arouse interest and curiosity in students. This demonstration fascinates audiences and in courses for science majors it is an excellent way to introduce complex concepts such as far-from-equilibrium conditions, nonlinear dynamics and bifurcation, and chaos theories.
Supplement
CAS numbers of all substances used in these demonstrations are available.
*  Contents JCE2005p0053W.doc (Microsoft Word)
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More Information
*  Citation
 Prypsztejn, Hernán E. J. Chem. Educ. 2005 82 53.
*  Keywords
 Demonstrations; Introductory / High School Chemistry; Luminescence; Photochemistry
*  History
 Created:
Last Updated:		 November 29, 2004
December 14, 2004
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