Abstract
Precise molar conductances of Bu4NBPh4, Bu4NI, Bu4NNO3, AgNO3, LiNO3, NaBPh4 and KI have been measured in acetone (Ac), dimethylsulphoxide (DMSO) and Ac + DMSO mixtures over the whole solvent composition range at 25°C. The conductance data has been analysed by computer using Shedlovsky conductance equation. Limiting ionic conductances have been calculated by using Gill’s model. Evaluation of solvated radii of Li+, Na+, K+ and Ag+ ions in Ac + DMSO mixtures shows strong preferential solvation for Li+ ion by DMSO. Na+ and Ag+ ions are found to be preferentially solvated by DMSO in Ac-rich region and by Ac in DMSO rich regions. K+, NO3- and I- ions show no preferential solvation in Ac + DMSO mixtures.
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