Activation energy of tracer-diffusion of manganese ions (Mn2+) in alkali metal chloride solutions

The activation energy of the tracer diffusion of Mn2+ ions in alkali chlori d solutions (0.1M) has been determined in agar gel medium (1-2.5%) over the temperature range of 25-45 degrees C. The decrease in the value of the Arr henius parameters, E and D-0, with gel percentage is explained on the basis of the transition state theory. Further, the activation energy as a functi on of electrolyte concentration is also investigated using 1% agar gel in t he temperature range of 25-45 degrees C. In both the cases, the activation energies are determined by the least square fitting of the diffusion coeffi cient data obtained at various temperatures through the Arrhenius plots.