Concentration dependence of ionic hydration numbers

Yizhak Marcus*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

Isothermal compressibility data of 23 aqueous electrolyte solutions at 25 °C from the literature are used to calculate their hydration numbers, which diminish as the concentration increases. Their limit at very high concentration is near the "number of adsorption sites" of water molecules on the ions, obtained by the BET method. On the contrary, hydration numbers obtained from ultrasound speed measurements yielding isentropic compressibilities cannot be valid, being much too large at infinite dilution.

Original languageEnglish
Pages (from-to)10471-10476
Number of pages6
JournalJournal of Physical Chemistry B
Volume118
Issue number35
DOIs
StatePublished - 4 Sep 2014

Bibliographical note

Publisher Copyright:
© 2014 American Chemical Society.

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