Abstract
It has been shown that part of the free volume of a solvent attaching to the solvation shell must be excluded from the total free volume in the Bachinskii equation. This determines the increase of viscosities of solutions with positive solvation. An equation has been obtained for the inverse relative viscosity of solutions η0/η = 1-zN2/(1-N2), where no and η are the dynamic viscosities respectively of the solvent and the solution; z is the solvation number, N2 is the mole fraction of dissolved material. A method is proposed for determining the solvation number (hydration) from solution viscosity data. Solvation numbers obtained by this method are in good agreement with values of z obtained from the literature and determined by other methods.
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Translated from Teoreticheskaya i Experimental'naya Khimiya, Vol. 21, No. 5, pp. 627–631, September–October, 1985.
The author wish to express their gratitude to professors Yu. Ya. Fialkov and M. A. kvadrigin for fruitful discussions of the result of the current work.
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Koshkin, V.M., Evtushenko, V.D. & Muraeva, O.A. Relative viscosity and the solvation number in solutions. Theor Exp Chem 21, 600–603 (1985). https://doi.org/10.1007/BF00944103
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DOI: https://doi.org/10.1007/BF00944103