Activity coefficients of single ions III: The difference between the standard chemical potentials of single ions in methanol and methanol‐water mixtures and in water at 25°C, and some related quantities

The method described by De Ligny et al. for the estimation of activity coefficients of single ions, which originated from ideas of Alfenaar and De Ligny, Buckingham, Halliwell and Nyburg and Muirhead‐Gould and Laidler, has been improved further. The modified method was applied successfully to the transfer of ions from water to methanol and methanol‐water mixtures. A similar method was used to estimate the standard partial molar enthalpy of transfer ΔH° of single ions, and from these data values for the standard partial molar entropy of transfer ΔS° were obtained. The differences between the standard real potentials of the chloride ion in methanol and methanol‐water mixtures, and in water have been determined by Case and Parsons. From these data, the corresponding differences for the standard chemical potentials and the surface potential of water, the surface potentials of methanol and methanol‐water mixtures, were determined.