Abstract
The quasichemical model of hydration have been used to calculate the speed of ultrasound in binary solutions of water and nonelectrolyte. The model has been confined to systems that exhibit a maximum in the ultrasonic velocity vs. nonelectrolyte concentration. The parameters of the model are the hydration equilibrium constant, the nonelectrolyte hydration number, and the molar volume and compressibility of the hydrated nonelectrolyte. These have been fitted to experimental results by the method of least squares. The model calculations reproduce qualitatively the ultrasonic velocity as a function of nonelectrolyte concentration. The calculated maximum of the ultrasonic velocity is generally too low, but the nonelectrolyte concentration at which this maximum occurs agrees well with experiment.
Addition of a third component shift the velocity maximum. The quasichemical model has also been used to calculate this shift. These calculations have been based on the parameters developed for the binary system. The shift on the nonelectrolyte concentration scale is reproduced satisfactorily, but the shift of the maximal value of the ultrasonic velocity is less accurately predicted by the model.
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Antosiewicz, J., Høiland, H., Zolkiewski, M. et al. Quasichemical interpretation of the ultrasonic velocity in ternary aqueous systems. J Solution Chem 16, 285–294 (1987). https://doi.org/10.1007/BF00646120
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DOI: https://doi.org/10.1007/BF00646120