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Kinetics and Mechanism of Iodide Oxidation by Iron(III): A Clock Reaction Approach

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Petar B. A. Vrkljan

XVIII Gymnasium, Zagreb, Croatia

Jurica Bauer and Vladislav Tomisic

Department of Chemistry, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia

J. Chem. Educ., 2008, 85 (8), p 1123

DOI: 10.1021/ed085p1123

Publication Date (Web): August 1, 2008

Abstract

A simple method for studying the kinetics of a chemical reaction is described and the significance of reaction orders in deducing reaction mechanisms is demonstrated. In this student laboratory experiment, oxidation of iodide by iron(III) ions in an acidic medium is transformed into a clock reaction. By means of the initial rates method, it is found that the reaction is second order with respect to iodide and first order with respect to iron(III) ions. Having established the rate law, the students are encouraged to propose a possible mechanism for the reaction investigated.

Keywords (Audience):

Upper-Division Undergraduate

Keywords (Domain):

Laboratory Instruction

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Kinetics

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Received: August 03, 2009

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Article

Kinetics and Mechanism of Iodide Oxidation by Iron(III): A Clock Reaction Approach

Abstract

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History

Recommend & Share

Related Content

Kinetics of the oxidation reactions of iodide and iron(II) ions by tris(1,10-phenanthroline)iron(III) ion in aqueous mixtures of methanol and ethanol

Clock Reaction: Outreach Attraction

A Student Laboratory Experiment Based on the Vitamin C Clock Reaction

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