Studies on ion association and solvation of multi-charged electrolytes (potassium ferricyanide and ferrocyanide) in aqueous and aqueous D-fructose mixtures at different temperatures

Sujit K. Dehury*, M. Talukdar

Abstract

The conductance of potassium ferricyanide and ferrocyanide has been measured in the concentration range of 1×10-3 to 6×10-2 mol dm-3 in aqueous and aqueous binary mixtures containing d-fructose (5, 10, 15% (w/w)) at different temperatures (298.15-313.15K). The conductance data in all cases have been computed by Shedlovsky equation to obtain Λo m and KA. Based upon the composition dependence of Walden product, the influence of the dfructose mixtures on the solvation of ions has been discussed. The values of the association constants, KA, are used to obtain various thermodynamic parameters for the association process in the solution. It has been observed that the electronic contribution is totally negligible towards the standard transfer thermodynamic quantities.