Surface tension of electrolyte solutions: Comparing the effects of ionic dispersion forces and solvation

S. A. Edwards; D. R.M. Williams

doi:10.1209/epl/i2006-10030-0

Surface tension of electrolyte solutions: Comparing the effects of ionic dispersion forces and solvation

S. A. Edwards^*, D. R.M. Williams

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

The Influence of salt on the surface tension of water is yet to be understood. We derive approximate analytical expressions for the influence of two different ion-specific effects on the surface tension of an electrolyte: the dispersion interaction between the ions and the air-water Interface, and the change in solvatlon energy of the ions as they approach the Interface. These formulae provide a simple means of comparing the relative importance of the two effects. We carry out such a comparison for the case of 1 M NaCl, and find that solvation is the dominant effect.

Original language	English
Pages (from-to)	854-860
Number of pages	7
Journal	Europhysics Letters
Volume	74
Issue number	5
DOIs	https://doi.org/10.1209/epl/i2006-10030-0
Publication status	Published - 1 Jun 2006

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abstract = "The Influence of salt on the surface tension of water is yet to be understood. We derive approximate analytical expressions for the influence of two different ion-specific effects on the surface tension of an electrolyte: the dispersion interaction between the ions and the air-water Interface, and the change in solvatlon energy of the ions as they approach the Interface. These formulae provide a simple means of comparing the relative importance of the two effects. We carry out such a comparison for the case of 1 M NaCl, and find that solvation is the dominant effect.",

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N2 - The Influence of salt on the surface tension of water is yet to be understood. We derive approximate analytical expressions for the influence of two different ion-specific effects on the surface tension of an electrolyte: the dispersion interaction between the ions and the air-water Interface, and the change in solvatlon energy of the ions as they approach the Interface. These formulae provide a simple means of comparing the relative importance of the two effects. We carry out such a comparison for the case of 1 M NaCl, and find that solvation is the dominant effect.

AB - The Influence of salt on the surface tension of water is yet to be understood. We derive approximate analytical expressions for the influence of two different ion-specific effects on the surface tension of an electrolyte: the dispersion interaction between the ions and the air-water Interface, and the change in solvatlon energy of the ions as they approach the Interface. These formulae provide a simple means of comparing the relative importance of the two effects. We carry out such a comparison for the case of 1 M NaCl, and find that solvation is the dominant effect.

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U2 - 10.1209/epl/i2006-10030-0

DO - 10.1209/epl/i2006-10030-0

M3 - Article

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SP - 854

EP - 860

JO - Europhysics Letters

JF - Europhysics Letters

IS - 5

ER -

Surface tension of electrolyte solutions: Comparing the effects of ionic dispersion forces and solvation

Abstract

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