CONDUCTANCE STUDIES OF SILVER(I) SALTS IN WATER-PYRIDINE MIXTURES

The conductance behaviour of silver(l) perchlorate and bromate has been studied in water-pyridine mixtures over the complete range of solvent compositions at 30-degrees-C. The sharp decrease of Walden product of silver ion up to 40 wt % pyridine has been ascribed to selective solvation by pyridine while a similar decrease in the initial stages of addition of water (starting from pure pyridine region) to an infinitely dilute solution of anions in pyridine was explained in terms of selective hydration ot anions. Conductance studies are useful in the elucidation of selective solvation of ions in binary solvent mixtures (1, 2) which is of technological interest (3, 4). In continuation of our earlier work in this area (5, 6), the results of our conductance measurements on silver(l) perchlorate and bromate in water-pyridine mixtures are reported in order to understand the ion-solvent interactions in these mixtures.