Abstract
The polarographic behavior of thorium ions in unbuffered aqueous and aqueous-alcohol solutions was followed, and it was shown that the depolarization effects of the thorium ions are caused by the hydrogen ion reduction from the aquo complexes of thorium and not by the reduction of thorium ions to the metal. It was also shown that the hydrogen ion separation can also occur, with the hypothesis of completely mobile equilibrium, in several distinct steps if the dissociation constants of the corresponding protron donors are different. The depolarization effects of either hydrolyzable ions such as zirconium, aluminum, and beryllium were also indicated. (tr-auth)
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