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ERIC Number: EJ1003031
Record Type: Journal
Publication Date: 2012-Nov
Pages: 4
Abstractor: As Provided
Reference Count: 18
ISBN: N/A
ISSN: ISSN-0021-9584
A Modified Recipe and Variations for the Briggs-Rauscher Oscillating Reaction
Furrow, Stanley D.
Journal of Chemical Education, v89 n11 p1421-1424 Nov 2012
A modified recipe for the Briggs-Rauscher oscillating reaction is suggested. The modified recipe, [H[subscript 2]SO[subscript 4]] = 0.10 M, [KIO3] = 0.020 M, [NaIO[subscript 4]] = 0.00062 M, [malonic acid] = 0.050 M, [MnSO[subscript 4]] = 0.0067 M, [H[subscript 2]O[subscript 2]] = 1.0 M with 0.01% starch, turns blue almost immediately, then oscillations start with two "slow" (approximately 25 s) cycles, then settle into regular approximately 12-15 s cycles. Oscillations end with a clear solution, avoiding cleanup of solid iodine resulting from the "standard" recipe, so that only neutralization of excess acid is needed before disposal. Effects of concentration variations are presented. (Contains 1 table and 3 figures.)
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
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A