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Citric acid oxidation by vanadium(V) in sulfuric acid medium: Kinetic and mechanistic study

✍ Scribed by Cristiano Raminelli; Wagner José Baretto; Keiko Takashima

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
95 KB
Volume
32
Category
Article
ISSN
0538-8066

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✦ Synopsis

The citric acid oxidation by vanadium(V) in sulfuric acid medium at is re-303 K ported. The reaction rate was determined spectrophotometrically by monitoring the formation of vanadium(IV) at

The oxidation showed a first-order dependence with respect to 760 nm. vanadium(V) concentration and fractional order with respect to citric acid concentrations, with no control and with constant ionic strength. The reaction is also first order with respect to sulfuric acid concentration with no control and of fractional order at constant ionic strength. The reaction rate is enhanced by an increase of ionic strength and increased by a decrease of the dielectric constant. The activation parameters were calculated based on the rate constants determined in the 293 to interval. The proposed oxidation mechanisms and the derived 313 K rate laws are consistent with the experimental rate laws.

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