Published November 8, 1984 | Version v1
Journal article

Chemical behavior of SO3- and SO5- radicals in aqueous solutions

  • 1. National Bureau of Standards, Gaithersburg, MD

Description

The chemistry of the radicals SO3- and SO5- has been investigated by using pulse radiolysis with kinetic spectrophotometry. Rate constants for the oxidation by SO3- of a variety of organic compounds were measured and equilibrium constants determined for the reactions of SO3- with chlorpromazine and phenol. SO3- was found to be a mild oxidant with a redox potential of E(SO3-/SO32-) = 0.63 V (vs. NHE) at pH > 7 and E(SO3-/HSO3-) = 0.84 V at pH 3.6. The reaction of SO3- with O2 was shown to produce SO5-. The oxidation of several compounds by SO5- was found to occur more rapidly than their oxidation by SO3-. E(SO5-/HSO5-) was estimated to be approximately 1.1 V at pH 7. 44 references, 2 figures, 2 tables

Additional details

Additional titles

Augmented title (English)
Pulsed irradiation

Publishing Information

Journal Title
J. Phys. Chem.
Journal Volume
88
Journal Issue
8
Series
J. Phys. Chem.
Journal Page Range
5665-5669
ISSN
0022-3654