"The kinetics of the isotopic exchange reaction between O¹⁸-enriched chromate ion and solvent water have been measured as a function of pH and chromate ion concentration. The exchange kinetics can be explained in terms of the dimerization equilibria HCrO4̄ + Cr₂O[subscript 7 with double dash above] [double arrows] Cr₂O[subscript 7 with double dash above] + OH⁻ and 2HCrO4̄ [double arrows] Cr₂O[subscript 7 with double dash above] + H₂O except at high pH, where it is independent of pH. Rate constants at 30ºC for the reactions of the dimerization equilibria and the first order reaction at the high pH have been evaluated from the exchange results. The activation energy of the exchange at pH 8.70 and 1.15M̲ chromate ion is 11,400 cal mole⁻¹. The reaction proceeds faster in D₂O with RD/RH equal to 1.64 at pH 7.2. The experimental results are compared with the values obtained by other investigators"--Abstract, page ii.
McDonald, H. O. (Hector O.)
Hanna, Samir B.
Ho, C. Y. (Chung You), 1933-1988
M.S. in Chemistry
University of Missouri--Rolla
vii, 39 pages
© 1970 James Hsiao-Hsin Chiang, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Chemical kinetics -- Mathematical models
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Link to Catalog Record
Chiang, James Hsiao-Hsin, "A study of the oxygen exchange between chromate ion and water" (1970). Masters Theses. 7208.