Kinetics and mechanism of the reaction between thiosulfate and chlorite ions at 90°C

I. Nagypál, Irving R. Epstein, Kenneth Kustin

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The kinetics of the oxidation of S2O3 2− by ClO2 have been studied in aqueous alkaline solution at 900C using classical titrimetric methods to follow the course of the reaction. The reaction takes place according to the stoichiometry S2O3 2− + 2ClO2 + 2OH = 2SO4 2− + 2Cl + H2O even in large S2O3 2− excess. There is some indication of a complex reaction pattern, but 70% of the ClO2 disappearance can be best described by the autocatalytic rate equation ‐d[ClO2 ]/dt = k[S2O3 2−] [ClO2 ] [H+] with k = (1.3 ± 0.2) ×108 M−2 sec−1. The mechanism is explained by postulating nucleophilic attack of S2O3 2− on HClO2 to form a chlorine‐containing intermediate.

Original languageEnglish
Pages (from-to)345-353
Number of pages9
JournalInternational Journal of Chemical Kinetics
Volume18
Issue number3
DOIs
Publication statusPublished - 1986

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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