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Kinetics of oxidation of p-methylmandelic acid by cerium(IV) in aqueous sulphate media

✍ Scribed by G. Arcoleo; G. Calvaruso; F.P. Cavasino; C. Sbriziolo

Publisher: Elsevier Science
Year: 1977
Tongue: English
Weight: 657 KB
Volume: 23
Category: Article
ISSN: 0020-1693
DOI: 10.1016/s0020-1693(00)94766-2

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✦ Synopsis

The kinetics of the oxidation of p-methylmandelic acid (MMA) by ceric sulphate has been studied in aqueous sulphuric acid solutions and in H2S04-HC104 and H2S04-LiHS04 mixtures. In these mktures the observed rate law is: -d[Ce(IV)]/dt = k[MMA][Ce(IV)],

where k = kl + k&l + a)'

constant). The temperature dependence of the oxidation rate and the effect of ionic strength have been also investigated. It is pointed out that the kinetic data obtained for the solutions containing sulphuric acid alone are to be considered with caution because of the linear dependence existing between the stoichiometric molar concentration of H2S04 and both the HSO:, SOi-and H' concentrations and the ionic

strength over the acid range 0.050-3.9 7 M.

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