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Revisiting the kinetics and mechanism of the tetrathionate-hypochlorous acid reaction in nearly neutral medium.
MedLine Citation:
PMID:  19902956     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
The tetrathionate-hypochlorous acid reaction has been investigated in nearly neutral medium at I = 0.5 M ionic strength and T = 25.0 +/- 0.1 degrees C in dihydrogen-phosphate-hydrogen-phosphate buffer by UV-vis spectrophotometry. In excess of hypochlorous acid, the stoichiometry was found to be S(4)O(6)(2-) + 7HOCl + 3H(2)O --> 4SO(4)(2-) + 7Cl(-) + 13H(+), but in excess of tetrathionate colloidal sulfur precipitates. On the basis of the simultaneous evaluation of the kinetic curves, a nine-step kinetic model with four fitted and five fixed rate coefficients is proposed. Analogous oxidation reactions of tetrathionate are also compared and discussed.
Authors:
D?nes Varga; Attila K Horv?th
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The journal of physical chemistry. A     Volume:  113     ISSN:  1520-5215     ISO Abbreviation:  J Phys Chem A     Publication Date:  2009 Dec 
Date Detail:
Created Date:  2009-12-16     Completed Date:  2010-02-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9890903     Medline TA:  J Phys Chem A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  13907-12     Citation Subset:  -    
Affiliation:
Department of Inorganic Chemistry, University of P?cs, Ifj?s?g ?tja 6., H-7624 P?cs, Hungary.
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