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Reaction between U(IV) and H2O2 in hydrochloric acid medium

✍ Scribed by P. K. Bhattacharyya; R. D. Saini; P. B. Ruikar

Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
450 KB
Volume
14
Category
Article
ISSN
0538-8066

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✦ Synopsis

Abstract

Kinetic investigations on the reaction between U(IV) and H~2~O~2~ have been carried out at different acidities in chloride medium at an ionic strength of 2__M__. The observed bimolecular rate constant has been found to be dependant on [H^+^]^βˆ’1.3^. The activation energy of the overall reaction has been found to vary from 13.4 Β± 0.7 to 18.0 Β± 0.8 kcal/mol in the range of acidity from 0.3 to 1.5__M__. The results have been explained on the basis of three parallel rate‐controlling reactions involving unhydrolyzed species of U(IV) and hydrolyzed species UCl(OH)^2+^ and UO^2+^. The values of the rate constants for these three reaction paths have been found to be of the order of 3.95, 5.59 Γ— 10^3^, and 1.49 Γ— 10^5^M^βˆ’1^ min^βˆ’1^, respectively.

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