Abstract
The temperature dependence of the adiabatic compressibility of solutions of caesium chloride in water has been determined for different solute concentrations from 14 to 40 wt.%. The compressibility data thus obtained, together with density data, are described in terms of water coordination shells by using a simple model, without the need for further information on the physical properties of the hydration sphere. On the basis of the analysis performed it has been possible to estimate the values of the volume contraction caused by ion-water interactions, the intrinsic volume of ions, the hydration numbers, the compressibility and density of water in hydration shells and their variation with temperature and salt concentration.
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