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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/349

Authors: Fedlu, Kedir
Advisors: Dr. Saleem M.Desai
Copyright: 2007
Date Added: 11-Dec-2007
Publisher: Addis Ababa University
Abstract: The kinetics of oxidation of Ruheman’s Purple by aqueous alkaline permanganate in alkaline medium at a constant ionic strength has been studied spectrophotometrically. The oxidation process in alkaline medium under the conditions employed in the present investigation proceeds initially through the formation of an RP-permanganate complex, which again rearranges it self to form an other complex. The latter complex decomposes into products up on reacting with alkali in fast stage of the reaction. The reaction constants involved in the mechanism were derived. There is good agreement between the experimental and calculated rate constants under different experimental condition. The reaction between permanganate and Ruheman’s Purple in alkaline medium exhibits 1:2 stoichiometry (Ruheman’s Purple: KMnO4). The reaction shows first order dependence on [permanganate] and apparent less than unit order dependence each on Ruhemann’s Purple and alkali concentrations. Reaction rate increases with increase in ionic strength and decrease in solvent polarity of the media. Initial addition of reaction products did not affect the rate significantly. A mechanism of reaction involving the oxidant and substrate has been proposed. The activation parameters were computed with respect to the slow step of the mechanism and discussed.
Description: A Project work presented to the School of Graduate Studies, Addis Ababa University, in Partial fulfillment of the requirement for the degree of Master of Science in Chemistry.
URI: http://hdl.handle.net/123456789/349
Appears in:Thesis - Chemistry

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