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A Novel Experiment in Chemical Kinetics: The A <> B > C Reaction System

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B. R. Ramachandran and Arthur M. Halpern

Department of Chemistry, Indiana State University, Terre Haute, IN 47809

J. Chem. Educ., 1997, 74 (8), p 975

DOI: 10.1021/ed074p975

Publication Date (Web): August 1, 1997

Abstract

This paper describes an interesting kinetics experiment involving a reaction that can be analyzed in terms of a reversible, two-step consecutive mechanism. The reduction of chromium(VI) by glutathione, GSH, which follows such a reaction scheme, can be conveniently studied in real-time spectrometrically. Two methods for estimating the rate constants of interest are discussed: exponential stripping and global nonlinear regression analysis. The reaction described is highly amenable to analysis, and is thus very suitable for the undergraduate physical chemistry or biochemistry laboratory.

Keywords (Audience):

Upper-Division Undergraduate

Keywords (Domain):

Physical Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Laboratory Computing / Interfacing

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