Solvation of praseodymium and cerium chlorides in anhydrous methanol and iso-propanol from ultrasonic velocity measurements

Abstract

Ultrasonic velocities and densities were measured, and the isentropic compressibility coefficients and solvation numbers for and (anhydrous and hydrated) solutions in methanol and iso-propanol at 25 ¡C were CeCl 3 PrCl 3 calculated. The results were interpreted in terms of inner-sphere coordination of chloride anions by lanthanide cations, as well as changing dissociation degree of the solutes with concentration. The steric e †ect of the solvent molecules on modelling the structure and coordination number of metal ions was considered and compared with the X-ray di †raction of solid solvates. The above studies were correlated with our earlier optical investigations1 and conÐrmed by conductivity measurements. For comparison, the same methods were also applied to cesium, calcium and tetraethylammonium chlorides.

Hydration Numbers of Nonelectrolytes from Acoustic Methods

“…The acoustic Pasynski method was often applied to determine the hydration or solvation numbers of simple 1:1, 1:2, 1:3, 2:1, 2:2, 3:1, and 4:1 valence-type electrolytes in aqueous − and nonaqueous systems ,− and also in mixed water + organic solvents. ,,− …”