AI Article Synopsis
- The study calculated the theoretical mean molar electrostriction volume of various electrolytic solvents using their density, compressibility, and permittivity properties.
- It defined the molar electrostriction for ions in such solvents by analyzing the differences between their standard partial molar volumes and intrinsic volumes.
- The research also established ratios to quantify solvation numbers and solvent molecule release during ion interactions, creating a comprehensive table for available solvents, ions, and ion pairs, and extending the analysis to nonaqueous solvents.
Article Abstract
The theoretical mean molar electrostriction volume of electrolytic solvents, DeltaVel(solvent), was calculated from their properties: the relative pressure derivatives of the density (the compressibility) and permittivity and their second pressure derivatives. The molar electrostriction caused by ions at infinite dilution was taken as the differences of their standard partial molar volumes in the solution and their intrinsic volumes: DeltaVel(ion) = Vinfinity(ion) - Vin(ion). The ratio ninfinity = DeltaVel(ion)/DeltaVel(solvent) then represents the solvation number of the ion in the solvent at infinite dilution. Similarly, from the molar volume change on ion pair formation, DeltaVip, the ratio Deltanip = DeltaVip/DeltaVel(solvent) represents the number of solvent molecules released thereby. These values were tabulated for those solvents, ions, and ion pairs for which the relevant information could be found, the extension to nonaqueous solvents not having been attempted previously.
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