Abstract
The rate of the electron exchange reaction between U(IV) and U(VI) has been studied in high concentrations of hydrochloric acid and was found to be accelerated by large concentrations of chloride ion. From the rates at different temperatures, ranging from 30° to 70°C, an activation energy and entropy of 32·2 kcal/mole and 25·5 e.u., respectively, were calculated. Possible mechanisms consistent with the observed rate law are proposed.
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