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Kinetics and mechanism of the hydrolytic disproportionation of iodine

✍ Scribed by Krisztina Sebők-Nagy; Tamás Körtvélyesi

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
101 KB
Volume
36
Category
Article
ISSN
0538-8066

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✦ Synopsis

Abstract

Kinetics of the hydrolytic disproportionation of I~2~

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was studied by UV–VIS spectrophotometry at 298 K and at the ionic strength 0.2 M (NaClO~4~) in buffered solutions in the pH range 8.91–10.50 at different initial iodide concentrations. The characterization of this reaction is fundamental for modeling oscillatory and front reactions in the presence of iodine as reactant or intermediate as well as for drinking water treatment. A matrix rank analysis confirmed three absorbing species in the beginning of the reaction, whereas later assumption of two species is enough to describe the experimental data in the visible part of the spectrum. A reaction mechanism was proposed for disproportionation by using fitting/simulation with a multipurpose program package ZiTa, by simultaneous evaluation of 17,906 points in 79 experimental curves. A parameter set was suggested, which was obtained by absolute, relative, and orthogonal fittings of the experimental data. © 2004 Wiley Periodicals, Inc. Int J Chem Kinet 36: 596–602, 2004

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