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Micelles in the Physical Chemistry Laboratory. Kinetics of Hydrolysis of 5,5'-Dithiobis-(2-nitrobenzoate) in Basic Solution

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Kathryn R. Williams

Department of Chemistry, University of Florida, Gainesville, FL 32611-7200

J. Chem. Educ., 2000, 77 (5), p 626

DOI: 10.1021/ed077p626

Publication Date (Web): May 1, 2000

Section:

History, Education, and Documentation

Abstract

This paper describes the second in a series of laboratory experiments demonstrating the effects of micelles on physicochemical properties. The kinetics of the hydrolysis of 5,5'-dithiobis-(2-nitrobenzoate) (DTNB^2-) in basic solution are studied by UV spectrophotometry. The reaction is conducted both without and with added cetyltrimethylammonium bromide (C₁₆TAB) to observe the rate enhancement in the presence of micelles. With the conditions specified in the experiment, total reaction times are in the range of 15 seconds to 15 minutes, thus allowing several data sets to be acquired in a single laboratory period.

Keywords (Audience):

Upper-Division Undergraduate

Keywords (Domain):

Laboratory Instruction

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Kinetics

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Citing Articles

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This article has been cited by 3 ACS Journal articles (3 most recent appear below).

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  Developments in the physical chemistry laboratory since the publication of the germinal text by Schwenz and Moore (1) are categorized and reviewed. The categories examined include modern instrumentation, current topics in chemistry, integrated ...
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Micellar Effects on the Spontaneous Hydrolysis of Phenyl Chloroformate. A Kinetic Experiment for the Physical Chemistry Laboratory
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Journal of Chemical Education2001 78 (11), 1538
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Micelles in the Physical/Analytical Chemistry Laboratory. Acid Dissociation of Neutral Red Indicator
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Journal of Chemical Education2001 78 (3), 349
- Micelles in the Physical/Analytical Chemistry Laboratory. Acid Dissociation of Neutral Red Indicator
  Kathryn R. Williams and Loretta H. Tennant
  Journal of Chemical Education2001 78 (3), 349
  This paper describes the third in a series of laboratory experiments demonstrating the effects of micelles on physicochemical properties. The acid dissociation constant for neutral red indicator is measured spectrophotometrically in water and in solutions ...
  Abstract | Hi-Res PDF | PDF w/ Links