The reaction has been studied spectrophotometrically monitoring the absorbance in the 240-400 nm wavelength range. The spectra of the reactants, intermediates, and products in this system are overlapping; thus special programs have been used (and tested) to unravel the kinetics and mechanism of the reaction. The stoichiometry of the reaction in excess hypochlorous acid is S4O62-+7HOCl+3H2O+4SO42 - +7Cl-+13H+. Various experiments are presented to show that - in excess tetrathionate - the reaction produces a light-absorbing intermediate identified as S2O3Cl-. The intermediate slowly hydrolyzes into sulfur and sulfate and it yields pentathionate in excess tetrathionate. The rate-determining steps and their rate constants are given.
|Number of pages||8|
|Journal||International Journal of Chemical Kinetics|
|Publication status||Published - jan. 1 2000|
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry