Published January 1977
| public
Journal Article
Kinetics and mechanism of oxidation of hydrogen sulfide by hydrogen peroxide in acidic solution
- Creators
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Hoffmann, Michael R.
Chicago
Abstract
The kinetics of the oxidation of hydrogen sulfide and hydrosulfide ion to sulfur and sulfate in aqueous solution by hydrogen peroxide is studied potentiometrically. In the pH range 8-3, the rate law for the oxidation of H_2S is -d[H_2S]/dt = k_1[H_2S] [H_2O_2] + k_2K_(a1)[H_2S] [H_2O_2]/[H+] where K_(a1) is the first acid dissociation constant of H_S, k_2 = 29.0 M^(-1) min^(-1), and k_1= 0.5 M^(-1) min^(-1). The rate law and other data indicate that the reaction proceeds via a nucleophilic displacement by sulfide on hydrogen peroxide with the formation of polysulfide intermediates.
Additional Information
© 1977 American Chemical Society. Received for review, July 11, 1975. Accepted July 23, 1976. Financial support by the Rockefeller Foundation and the Public Health Service (ES 00080-08). The author thanks J. J. Morgan and T. Holm for helpful discussion.Additional details
- Eprint ID
- 62925
- Resolver ID
- CaltechAUTHORS:20151215-094958671
- Rockefeller Foundation
- U.S. Public Health Service (USPHS)
- ES 00080-08
- Created
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2015-12-15Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field