Ion-solvation studies of chloramine-T species in water, acetonitrile, DMF and their mixture by conductometry

Abstract

Transport property of the species of chloramine-T has been studied in water, acetonitrile, DMF and varying compositions (v/v) of water-acetonitrile, water-DMF mixtures and the data analysed by different conductivity models to identify the involvement of association process in the system. Limiting molar conductance has been found to be maximum in acetonitrile and minimum in DMF indicating the preferential solvation of cation by DMF. Association constant has been identified at all temperatures and compositions. Thermodynamic parameters have been estimated in all the cases. Viscosity of various solvents and solvent mixtures have been determined and used to compute Walden product from which Stoke's molecular radius is estimated. The ion-solvent and solvent-solvent interactions involved in the system have been qualitatively discussed.