Radiochemical Investigation of the Kinetics of the Electron Exchange Between the Oxidation States of Tin

Citation

Craig, Roy Phillip (1950) Radiochemical Investigation of the Kinetics of the Electron Exchange Between the Oxidation States of Tin. Master's thesis, California Institute of Technology. doi:10.7907/4e56-hq86. https://resolver.caltech.edu/CaltechTHESIS:06162025-180659877

Abstract

The kinetics of the electron exchange between Sn^II and Sn^IV in 10.0 f HCl have been investigated by the use of a radio-active tracer. It is found that the rate of exchange is proportional to the product of the Sn^II and Sn^IV concentrations. In the HCl concentration range between 9.0 f and 11.0 f, the exchange rate is found to be proportional to the 0.3 power of the HCl activity, giving the empirical rate equation R = k [Sn^II] [Sn^IV] (HCl)^0.3

Radio-active exchange experiments carried out at 0° C. and at 25.2°C. show this exchange to have an activation energy of 10.7 Kcal. per mole. The exchange is found to be homogeneous.

It is found that exposure of the Sn^II-Sn^IV solutions to illumination from a capillary Hg arc gives a marked photochemical increase in the rate of electron exchange between the two valence states.

Preliminary spectrophotometric investigations of cobalt-glycine systems also have been made.

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