Ionic solvation in water + Co-solvent mixtures. Part 2.—Free energies of transfer of single ions from water into mixtures of water with acetone, isopropanol, glycerol or methanol
- 1 January 1974
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 70, 694-704
- https://doi.org/10.1039/f19747000694
Abstract
The method used previously to calculate the free energy of transfer ΔG°t of the solvated proton from water into methanol + water mixtures is applied to mixtures of water with acetone, isopropanol or glycerol. ΔG°t(HCl) for these mixtures has been calculated from values for the standard electrode potentials for appropriate cells, and ΔG°t(Cl–) obtained using the values for ΔG°t(H+). ΔG°t for some silver salts into acetone + water are calculated from solubility products. These ΔG°t and other published ΔG°t(MX) for acetone + water and methanol + water are separated into ΔG°t(M+) and ΔG°t(X–). Values for the ionic product of water in methanol + water are used to calculate ΔG°t(OH–), and values for ΔG°t(NH4 +)–ΔG°t(NH3) in methanol + water are also calculated. These ΔG°t values are compared with previous values in methanol + water and the differences between solvent mixtures discussed in terms of solvent structure and ionic solvation.Keywords
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