No abstract

The conductance and viscosity measurements of Bu4NBPh4, Bu4NI, NaBPh4, Pr4NI, Et4NI, Me4NI, Bu4NNO3, KI, KClO4, NaClO4, KNO3, AgNO3, LiNO3 and NaBr have been carried out in the concentration range of (0-100) . 10-4 mol dm-3 for conductance and (0-250) . 10-4 mol dm-3 for viscosity in dimethylsulphoxide (DMSO) and DMSO + dioxane mixtures at 25°C. The conductance and viscosity data have been analysed by the Shedlovsky and Jones-Dole equations, respectively. The limiting ionic conductance (λi0), solvated radii (ri) and the ionic viscosity coefficient (B±) values have been evaluated. The variation of ri and B± value as a function of solvent composition has been interpreted in terms of preferential solvation of ions in these solvent mixtures.