Croatica Chemica Acta, Vol. 70 No. 1, 1997.
Original scientific paper
Degrees of Dissociation and Hydration Numbers of Alkali Halides in Aqueous Solutions at 25 °C (Some up to Saturation)
Rajalakshmi Heyrovská
; Academy of Sciences of the Czech Republic, J. Heyrovsky Institute of Physical Chemistry, Dolejškova 3, Praha 8, Czech Republic
Abstract
Systematic researches in recent years have revived the earlier ideas of ionic association/dissociation and hydration as causes of non-ideality in solutions of strong electrolytes. Fundamental properties like vapour pressures, e.m.f. of concentration cells, equivalent conductivities, diffusion coefficients and molal volumes/densities of solutions were shown to be simple functions of the ionic molalities (not ionic activities) and hydration numbers, over large ranges of concentrations. Recently, the work was extended to cover the whole range of concentrations from zero to saturation for a strong electrolyte like NaCl(aq). This paper deals with the interpretations of osmotic and activity coefficients in terms of degrees of dissociation (a) and hydration numbers for all the alkali halides. Tables of a and relevant graphs are provided.
Keywords
Hrčak ID:
135604
URI
Publication date:
3.4.1997.
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