Abstract
In this work, aqueous solutions of 12 symmetrical tetra alkyl ammonium halides are modelled using the electrolyte cubic-plus-association (e-CPA) equation of state. The only adjustable parameter (the ion–water interaction parameter at reference temperature) is obtained by fitting the experimental mean ionic activity and osmotic coefficients at 298.15 K. The modelling results show that e-CPA can perform relatively well for the mean ionic activity and osmotic coefficients. To know a complete understanding of the capabilities and limitations of this modelling work, extensive analysis and discussion of experimental data, parameter estimation, and ion species is performed. Moreover, some possible improvements for the model are proposed based on the microscopic mechanism of the aqueous solutions.
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Acknowledgements
The authors acknowledge the support from the College of Mechanical and Electrical Engineering, Hohai University. This work was supported by the Applied Basic Research Program of Changzhou (Grant Agreement No. CJ20210057) and “the Fundamental Research Funds for the Central Universities” (Grant Agreement No. B210201039).
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Mao, Y., Cao, F., Bai, J. et al. Modelling of Mean Ionic Activity and Osmotic Coefficients in Aqueous Solutions of Symmetrical Tetra alkyl Ammonium Halides. J Solution Chem 52, 19–50 (2023). https://doi.org/10.1007/s10953-022-01211-w
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DOI: https://doi.org/10.1007/s10953-022-01211-w