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Chemistry

Missouri University of Science and Technology

Masters Theses

Theses/Dissertations

1970

Chemical kinetics -- Mathematical models<br />Hydrogen-ion concentration

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A Study Of The Oxygen Exchange Between Chromate Ion And Water, James Hsiao-Hsin Chiang Jan 1970

A Study Of The Oxygen Exchange Between Chromate Ion And Water, James Hsiao-Hsin Chiang

Masters Theses

"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 HCrO + Cr₂O[subscript 7 with double dash above] [double arrows] Cr₂O[subscript 7 with double dash above] + OH⁻ and 2HCrO [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 …