The 'Influence of Sulfuric Acid on the TI(I)-TI(III) Isotopic Exchange Reaction in Sodium Perchlorate-Perchloric Acid Sy stems

Abstract

The rate of isotopic exchange between thallium (I) and thallium (III) ions has been studied for elucidating the specific effect of sulfuric acid in the reaction. Measurements were carried out in NaClO₄-HClO₄ solutions, at 50°C, containing various amount of sulfuric acid. The rate constant thus determined changed linearly with the square of sulfate ion concentration, indicating that the BrOnsted-Bjerrum equation is applicable. It was concluded that the species responsible for the observed rate should be TlSO₄^- and TlSO₄⁺.