Electrical Conductivity of Rhenium-Containing Ammonium Carbonate Solutions and the Calculation of Its Activation Energy.

The conductometric method is used to study the dependences of the electrical conductivity (EC) of aqueous solutions of ammonium carbonate and solutions of the ammonium carbonate–ammonium perrhenate system on the reagent content in the concentration range 0.1–1.8 mol/L for (NH₄)₂CO₃ and 0.01–0.1 mol/L for NH₄ReO₄ and on the solution temperature in the range 20–50°C. EC is found to increase linearly with the electrolyte temperature and nonlinearly with the reagent concentration. The temperature coefficients of EC and its activation energies are calculated in the concentration and temperature ranges under study. The EC activation energy is found to decrease as the solution temperature increases. The calculated EC activation energies indicate a diffusion character of charge transfer. [ABSTRACT FROM AUTHOR]