Effective Ionic Radii and Hydration Volumes for Evaluation of Solution Properties and Ionic Adsorption |
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Authors: | B E Conway E Ayranci |
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Institution: | (1) Chemistry Department, University of Ottawa, 10 Marie Curie Street, Ottawa, K1N 6N5, Ontario, Canada;(2) Present address: Chemistry Department, Akdeniz University, Antalya, Turkey |
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Abstract: | Evaluation of effective ionic radii and corresponding individual hydrated-ion volumes provides data required for interpretation of various ion-specific solution properties and for understanding of specificity of ion adsorption at electrode and colloid interfaces. Principles involved in assignment of intrinsic ionic radii and hydrated-ion volumes are comparatively reviewed and examined as a basis for discussion of electrostriction volume changes. Three examples are given of applications of procedures for evaluation of individual hydrated-ion radii and volumes: (a) partial molal volumes and isentropic compressibilities of a series of oxyanions of various structures; (b) steric effects in hydration of alkylammonium and pyridinium cations; and (c) role of ion-hydration effects in specificity of chemisorption of electron donative anions at electrode surfaces. |
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Keywords: | Ionic radii ionic volumes electrostriction anion adsorption |
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