TRANSFERENCE NUMBERS OF LITHIUM-CHLORIDE AND TETRAALKYLAMMONIUM HALIDES IN 1-BUTANOL AT VARIOUS TEMPERATURES

Transference numbers of lithium chloride and some tetraalkylammonium halides have been measured in 1-butanol at 298.15, 308.15, and 318.15 K up to concentrations of 11.84 x 10(-2) mol dm-3. The transference numbers of the ions show much less variation with concentration and are in accordance with the Debye-Huckel limiting law. Transference numbers of the ions at infinite dilution have been evaluated from the linear plots of the transference number versus the square root of the concentration. Variation of limiting transference numbers of the ions with temperature agrees with the theoretical predictions. Relative solvation numbers of the ions evaluated at all the temperatures by the method suggested by Carman show some anomalies. Solvation numbers of the ions have been evaluated at 298.15 K by combining the present transference number data with reported conductance data. The solvation numbers of the ions reveal that the anions in 1-butanol are heavily solvated as compared to the cations of comparable sizes. This is in line with the protic nature of this solvent.