The thermodynamics of solvation of ions. Part 4.—Application of the tetraphenylarsonium tetraphenylborate (TATB) extrathermodynamic assumption to the hydration of ions and to properties of hydrated ions

Abstract

The tetraphenylarsonium tetraphenylborate (TATB) assumption, i.e. that thermodynamic and other quantities pertaining to the tetraphenylarsonium cation equal those pertaining to the tetraphenylborate anion, is applied to the standard enthalpy, entropy and Gibbs energy of hydration of ions, the standard partial molar heat capacity and volume of aqueous ions, and their equivalent conductivities and Dole–Jones B-coefficients of viscosity at infinite dilution, all at 298.15 K. The effect of uncertainties due to the non-equality in size of the TATB ions is discussed, and related to the relative magnitude of the quantity for small ions and for the constituent ions of TATB, as a criterion for the acceptance of the assumption.