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Influence of the structures of solid and liquid phases on the solubilities of salts in water

II. Influence of anion structures on solubility in the systems KSCN-KI-H2O and KSCN-KCl-H2O

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Summary

  1. 1.

    Solubility in the system KSCN-KCl-H2O at 25° was studied. As in the KSCN-KI-H2O system studied previously, the components do not form chemical compounds or solid solutions.

  2. 2.

    Solubilities in the systems KSCN-KI-H2O and KSCN-KCl-H2O were correlated with the structures of the component salts and of their saturated solutions.

  3. 3.

    The significant difference between the solubilities of thiocyanate and halides in the two systems is largely determined by structural differences between the SCN− anion and the I− and Cl− anions.

  4. 4.

    The high solubility of KSCN in binary and ternary solutions, in comparison with KI and KCl, is due to the relatively low stability of the short-range order of K+ and SCN− ions involved in crystallization and to the weak negative hydration of the SCN− anion.

  5. 5.

    Comparison of the average values of the substitution coefficients for KSCN, KI, and KCl forms the basis of certain purely qualitative concepts of the structural state of saturated solutions of these salts.

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Literature cited

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Authors and Affiliations

  1. L'vov Zooveterinary Institute and Futan University, Shanghai, China

    P. S. Bogoyavlenskii & Hsü K'o-min

Authors
  1. P. S. Bogoyavlenskii
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  2. Hsü K'o-min
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Translated from Zhurnal Strukturnoi Khimii, Vol. 1, No. 4, pp. 425–430, November–December, 1960

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Bogoyavlenskii, P.S., K'o-min, H. Influence of the structures of solid and liquid phases on the solubilities of salts in water. J Struct Chem 1, 397–401 (1960). https://doi.org/10.1007/BF00745882

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  • DOI: https://doi.org/10.1007/BF00745882

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