Abstract
By means of potentiometric titration of solutions of salts with solutions of potassium in liquid ammonia at −38°, it has been shown that bismuth(III) iodide is reduced to Bi0, , and without intermediation of either the +2 or +1 oxidation state of bismuth. Reduction of iron(II) bromide is very complex and apparently does not involve the intermediate formation of Fe+1. Reduction of potassium nitrate involves only reduction of nitrate ion to nitrite ion, followed by precipitation of potassium hydronitrite. Data relative to reduction of cobalt (II) nitrate have permitted a choice between two possible reduction mechanisms previously proposed. Data presented in this paper clearly demonstrate the usefulness of the potentiometric titration technique in the study of the mechanism of inorganic reduction reactions in ammonia.
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