Chemistry and Mathematics of the Belousov-Zhabotinsky Reaction in a School Laboratory

Autor/in	Barzykina, Irina
Titel	Chemistry and Mathematics of the Belousov-Zhabotinsky Reaction in a School Laboratory
Quelle	In: Journal of Chemical Education, 97 (2020) 7, S.1895-1902 (8 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Barzykina, Irina)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
Schlagwörter	Science Instruction; Chemistry; College Science; Undergraduate Study; Secondary School Science; High Schools; Scientific Concepts; Concept Formation; Science Laboratories; Technology Uses in Education; Video Technology; Science Experiments; Laboratory Experiments + Suchen Sie Ihr Suchwort? Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Chemie; Grundstudium; High school; Oberschule; Concept learning; Begriffsbildung; Technology enhanced learning; Technology aided learning; Technologieunterstütztes Lernen; Laboratory work; Laborarbeit
Abstract	Chemical reactions far from equilibrium can exhibit oscillatory behavior. Full understanding of this phenomenon is outside of the school curriculum. However, the importance of such processes in life sciences and peculiar spatial and temporal patterns accompanying the reactions can attract the attention of IB Diploma science students. They will have studied chemical kinetics and received sufficient background knowledge in ordinary differential equations in order to be able to appreciate how sceptical the scientific community was when chemical oscillations were first reported. In this article, the famous Belousov-Zhabotinsky (BZ) reaction is investigated, which involves oxidation of malonic acid to carbon dioxide by bromate ions in the presence of a transition metal catalyst. Cerium(IV) and Manganese(II) catalysts at different initial concentrations are used with the research goal of determining the influence of the catalyst on the way the oscillatory stage is established and on the properties of oscillations. Convincing evidence of oscillatory behavior is observed and quantified by digital video processing. The BZ reaction mechanism is reviewed on the basis of the Field, Körös, and Noyes (FKN) model in reduced Oregonator form. The resulting system of nonlinear differential rate equations is solved numerically, and a remarkable agreement of the theoretically predicted oscillation period with an experiment for a Cerium(IV) catalyst is achieved. (As Provided).
Anmerkungen	Division of Chemical Education, Inc. and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01