Diffusion of Cesium Ions in Agar Gel Containing Alkali Metal Bromides

Tracer Diffusion of Cr3+ Ions in Agar Gel Media Containing Transition-Metal Sulfates

“…It is also evident from the figures that at higher concentrations, the experimental values are not only larger than the theoretical ones but also show a change in the trend in the plots of D exptl versus C. The measured values of the diffusion coefficients increase with concentration, and this reversal in the trend of diffusion coefficient with concentration gives rise to a minimum in the curve. The occurrence of such minima in D-versus-C curves has been reported by several workers both in gel [14][15][16] and pure aqueous media. [17][18][19] The occurrence of a minimum in the D-versus-C plot can be explained qualitatively on the basis of Wang's model, 17 which considers the changes in the physical properties taking place at the microscopic level with increasing electrolyte concentration.…”

“…The measured values of the diffusion coefficients increase with concentration, and this reversal in the trend of diffusion coefficient with concentration gives rise to a minimum in the curve. The occurrence of such minima in D -versus-√ C curves has been reported by several workers both in gel − and pure aqueous media. − …”