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Application of solvation excess concept to solutions of 3 : 1 and 1 : 3 electrolytes

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Abstract

Data on water activity in solutions of a series of 3 : 1 and 1 : 3 electrolytes [AlCl3, Al(NO3)3, LaCl3, La(NO3)3, H3PO4, NaH2PO4] have been generalized in the frame of solvation excesses concept. Solvation excess reflects the distribution of the selected structural elements (ions or solvent particles) in the solution. The computed values have demonstrated the opposite contributions of ion association and hydration of ions and ion associates. Solvation excess concept allows determination of water molecules fraction constituting the excess at ions and their associates. The comparison of results obtained with different choice of model structural units has shown the electrolyte concentration ranges of validity of the respective models.

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Authors and Affiliations

  1. St. Petersburg State University, Universitetskii pr. 26, St. Petersburg, 198504, Russia

    A. A. Pendin & Z. G. Kuznetsova

Authors
  1. A. A. Pendin
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  2. Z. G. Kuznetsova
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Correspondence to Z. G. Kuznetsova.

Additional information

Original Russian Text © A.A. Pendin, Z.G. Kuznetsova, 2014, published in Zhurnal Obshchei Khimii, 2014, Vol. 84, No. 7, pp. 1057–1062.

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Pendin, A.A., Kuznetsova, Z.G. Application of solvation excess concept to solutions of 3 : 1 and 1 : 3 electrolytes. Russ J Gen Chem 84, 1255–1260 (2014). https://doi.org/10.1134/S1070363214070019

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  • DOI: https://doi.org/10.1134/S1070363214070019

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