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Verified analysis of hydration of electrolytes

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Abstract

Rigorous thermodynamic analysis of hydration parameters has been fulfilled. Water solutions of potassium chloride were studied in a wide range of concentrations from 0 to 23 wt.% in the temperature range 283.15–308.15 K by ultrasonic and densimetry measurements using heat capacity data at constant pressure. The structural characteristics of hydrated complexes are analyzed: hydration number, volume of the stoichiometric mixture of K+ and Cl− ions without hydration shells, compressibility and molar volume of water in hydration spheres, and their concentration and temperature dependences. The mean pressure in the hydration spheres of KCl ions is shown to be about 350 atm at 298.15 K.

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Authors and Affiliations

  1. Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo

    V. N. Afanasiev & A. N. Ustinov

Authors
  1. V. N. Afanasiev
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  2. A. N. Ustinov
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Original Russian Text Copyright © 2005 V. N. Afanasiev and A. N. Ustinov

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Translated from Zhurnal Strukturnoi Khimii, Vol. 46, No. 3, pp. 459–467, May–June, 2005.

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Afanasiev, V.N., Ustinov, A.N. Verified analysis of hydration of electrolytes. J Struct Chem 46, 446–455 (2005). https://doi.org/10.1007/s10947-006-0123-0

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  • DOI: https://doi.org/10.1007/s10947-006-0123-0

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