An improved chemical model for the quantitative description of the front propagation in the tetrathionate-chlorite reaction

Gábor Peintler, György Csek, Andrea Petz, Attila K. Horváth

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Abstract

It is experimentally proven that the stoichiometry of the tetrathionate-chlorite reaction is 2S4O2-6 + 8ClO-2 + 6H2O = 8SO2-4 + ClO-3 + 7Cl- + 12H+ near 1:4 molar ratio of the reactants. Re-evaluation of the previously measured front velocity - concentration curves also shows that this stoichiometry along with both the rate equation r = (1.6 × 105 M-3 s-1 [H +]2 + 3.6 × 107 M-4 s -1 [H+]3)[S4O2-6][ClO-2]and the protonation processes existing in the present system allow us to describe the front velocity as a function of the initial concentration of the reactants quantitatively. Some consequences detailed in the conclusions may concern not only uniquely the tetrathionate-chlorite reaction but any front propagation study including H+ as an autocatalyst.

Original languageEnglish
Pages (from-to)2356-2364
Number of pages9
JournalPhysical Chemistry Chemical Physics
Volume12
Issue number10
DOIs
Publication statusPublished - Mar 14 2010

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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