NDLI: Oxidation of Lactic Acid by Manganese ( III ) in Sulfuric Acid Medium : Kinetics and Mechanism

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Oxidation of Lactic Acid by Manganese ( III ) in Sulfuric Acid Medium : Kinetics and Mechanism

Content Provider	Semantic Scholar
Author	Sridhar Poloju Cholkar, Kishore Kouassi, Gilles Kouame Horn, J. David Van Rangappa, Kanchugarakoppal Subbegowda Gowda, Netkal M. Made
Copyright Year	2012
Abstract	The kinetics of oxidation of lactic acid (LA) by manganese(III) in sulfuric acid solutions at 293 K has been studied. A solution of the mild oxidant, Mn(III) sulfate, in aqueous sulfuric acid medium was prepared by a standard electrochemical method. The oxidation reaction was monitored by spectrophotometry at a fixed wavelength (λmax = 491 nm), varied temperature, and varied solution conditions. The Mn(III)-LA reaction stoichiometry of 4:1 was determined and the products were characterized. The experimental rate law is: rate = kobs [Mn(III)][LA][H], where x, and y are fractional orders. The effects of varying ionic strength, solvent composition (dielectric constant), acid, and the reduction product, Mn(II), on the rate of the reaction were investigated. Activation parameters evaluated using Arrhenius and Eyring plots suggest the occurrence of an entropy controlled reaction. A mechanism consistent with the observed kinetic data has been proposed. A rate law has been derived based on the mechanism.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://article.sapub.org/pdf/10.5923.j.ajoc.20120203.04.pdf
Language	English
Access Restriction	Open
Subject Keyword	Acetic Acid Belousov–Zhabotinsky reaction Carbon Dioxide Entropy (information theory) Ionic Strength Kinesiology Kinetics (discipline) Kinetics Internet Protocol Lactic acid Mn3+ Nevus Oxidants Pseudo brand of pseudoephedrine Solutions Solvents Spectrophotometry Sulfates, Inorganic Sulfuric acid Thioctic Acid orders - HL7PublishingDomain oxidation wavelength
Content Type	Text
Resource Type	Article

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