Thermodynamic Properties of Technetium and Rhenium Compounds. Ⅵ The Potential of the ReO3/Reo4- Electrode and the Thermodynamics of Rhenium Trioxide

摘要

The potential of the Re03/Re04 electrode has been measured over a wide range of concentration and pH and the standard electrode potential for the half reaction Re03 + H20 - ReO4 + 2H+ + e- has been found to be -0.768 ± 0.005 volts. The cell was demonstrated to be satisfactorily reversible by the close agreement of the standard potential calculated from measurements in both acidic and basic solutions, as well as from the reason able entropy values obtained from a determination of the temperature coefficient.