The electron exchange reaction between uranium (VI) and tin (II) in ethanol-water media

Abstract

The electron exchange reaction between uranium (VI) and tin (II) was studied at 25°, 35° and 45°C in water, 20·0, 40·0, 60·0, 80·0 and 99·9 weight per cent ethanol-water mixtures. In each solvent the reaction was studied in 1, 2, 4 and 6 M hydrochloric acid. The reaction was found to be first order with respect to uranium (VI), first order with respect to tin (II), and second order overall. The second order rate equation was obeyed to different percentages of completion of reaction in different compositions of ethanol and hydrochloric acid. In most cases second order kinetics was followed up to about 60–90 per cent completion of the reaction, though in higher percentages of alcohols and lower hydrochloric acid concentrations second order rates were observed for a few runs up to lower percentages completion, about 40–60 per cent completion.