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The kinetics of the arsenic(III) - chromium(VI) reaction on acetic acid-acetate buffers

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dc.contributor.authorKowalak, Albert Douglasen
dc.contributor.departmentChemistryen
dc.date.accessioned2021-10-26T20:10:35Zen
dc.date.available2021-10-26T20:10:35Zen
dc.date.issued1962en
dc.description.abstractA kinetic study of the oxidation of arsenic(III) by chromium(VI) was made in acetic acid-acetate buffers at ionic strengths 1.5M and 3.0M. The reaction rate showed a first order dependence on the arsenic(III), total chromium(VI), and acetic acid concentrations. Two possible mechanisms for the reaction have been suggested. One possibility is the formation of an arsenic-chromium adduct in which either the acid chromate or dichromate ion is involved. A second possible mechanism postulates adduct formation involving only the acid chromate ion, followed by a CrO₄= catalyzed decomposition of the adduct. In either suggested mechanism, the acetate and hydroxide ion catalyzes the decomposition of the adduct. The rate dependence on total chromium(VI) concentration is contrary to previous reports which postulate an adduct or ester mechanism. Induced reaction studies show the initial step involves the oxidation of one arsenic(III) species by chromium(VI) with the formation of tetravalent chromium as-a reactive intermediate. The stoichiometry or the overall reaction was found to be 3 As(III) + 2 Cr(VI) = 3 Aa(V) + 2 Cr(III).en
dc.description.degreeM.S.en
dc.format.extentvii, 79 leavesen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/106199en
dc.language.isoenen
dc.publisherVirginia Polytechnic Instituteen
dc.relation.isformatofOCLC# 22036314en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1962.K683en
dc.subject.lcshArsenicen
dc.subject.lcshChromiumen
dc.titleThe kinetics of the arsenic(III) - chromium(VI) reaction on acetic acid-acetate buffersen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineChemistryen
thesis.degree.grantorVirginia Polytechnic Instituteen
thesis.degree.levelmastersen
thesis.degree.nameM.S.en

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