The solvation number of ions obtained from their entropies of solvation

Y. Marcus*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

The entropy of solvation of an ion contains contributions from i) the change of the volume at its disposal, ii) long-range electrostatic effects, iii) immobilization of solvent molecules in the first solvation shell, and iv) effects on the structure of the solvent. The last item is important in water, but can be ignored in less structured solvents. Standard ionic entropies of transfer from water to a dozen solvents are used for the estimation of the entropy of solvent immobilization, and the (extrapolated) entropy of freezing of the solvent is then used to estimate the number of solvent molecules immobilized.

Original languageEnglish
Pages (from-to)291-306
Number of pages16
JournalJournal of Solution Chemistry
Volume15
Issue number4
DOIs
StatePublished - Apr 1986

Keywords

  • entropies of solvation
  • Entropies of transfer
  • ions
  • polar solvents
  • solvation numbers

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