Korean Journal of Chemical Engineering, Vol.5, No.1, 5-13, March, 1988
CONDUCTANCE OF TETRAALKYL AMMONIUM HALIDES IN ETHANOL-WATER MIXTURES
The conductance measurements are reported for tetraalkyl ammonium halides, Me4NCl, Me4NBr, Me4NI, Et4NBr, n-Pr4NCl, n-Pr4NI, n-Bu4NBr, in ethanol-water mixtures at 25, 30, 35 and 40℃. The conductance data were extrapolated by the Fuoss-Onsager conductance theory.
From the value of transference number of KCl, ionic cation and halides anion conductance can be readily separated. The effect of temperature and composition of solvent on the ionic mobility and conductance-viscosity product for cation and halide anion is discussed.
The results indicates that the halide anion, K+ and Me4N+ ions are structure breaking ion and the structure breaking powers of these ions are maximum at 0.1 mole fraction ethanol and increase in the order Cl-<I-<Br-<K+<Me4N+. The value of limiting ionic conductance-viscosity products relative to their values for pure water, Rxw, increase in the order Et4N+<n-Pr4N+<n-Bu4N+.
From the value of transference number of KCl, ionic cation and halides anion conductance can be readily separated. The effect of temperature and composition of solvent on the ionic mobility and conductance-viscosity product for cation and halide anion is discussed.
The results indicates that the halide anion, K+ and Me4N+ ions are structure breaking ion and the structure breaking powers of these ions are maximum at 0.1 mole fraction ethanol and increase in the order Cl-<I-<Br-<K+<Me4N+. The value of limiting ionic conductance-viscosity products relative to their values for pure water, Rxw, increase in the order Et4N+<n-Pr4N+<n-Bu4N+.