Ion hydration in aqueous CaCl2solutions
- 10 January 1980
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 13 (1), 1-8
- https://doi.org/10.1088/0022-3719/13/1/005
Abstract
The neutron first-order difference method has been applied to a 4.49 molal aqueous solution of CaCl2. Isotopic changes were made in both the Ca2+ ion and the Cl- ion so that a complete picture of ionic hydration could be obtained. Both ions coordinate water in a non-dipolar configuration with ion-oxygen distances close to those predicted by gas-phase quantum molecular calculations. The measured hydration numbers for cations and anions (5.5+or-0.3 and 5.8+or-0.3 respectively) imply substantial sharing of water molecules between the ions.Keywords
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