Precise measurements on the conductivity of Sodium Bromide in pure water and ethanol-water mixed solvent media containing 0.10, 0.20, 0.30, 0.40, 0.50 and 0.60 volume fractions of ethanol at room temperature are reported. The concentrations were varied from ~ 0.010 to ~ 0.10 mol.L -1 . The results showed a sharp increase in the conductivity with increasing electrolyte concentration. The conductivity of electrolyte decreases with increase in the amount of ethanol.Keywords: mixed solvent media, conductivity, sodium bromide, ethanol
INTRODUCTIONThe conductivity measurements provide important information on ion-ion and ion-solvent interactions [1]. Studies on electrolytic conductance in mixed solvents can provide useful information and sensitive indications of ion-solvent and ion-ion interactions and solvent structure. The effect of ion association on the conductance behavior of electrolytes has been a subject of extensive investigation. Although numerous conductance measurements have been reported in the literature, such studies in mixed solvents are relatively rare [2]. In recent, several studies have reported that the nature of the spherical ions, having a large variation in size in aqueous mixtures of the alcohols, has received considerable attention [3].