Abstract
The available literature data on the osmotic coefficient of ZnSO4(aq) at 25°C in the molality range from 0.1 to 4.3 mol-kg−1 and new experimental data from 1.2 to 2.9 mol-kg−1, at the same temperature, are presented. Selected values of the osmotic coefficient from all the data are analyzed using the Clegg-Pitzer-Brimblecombe model, the extended Pitzer model, and a semiempirical equation comprising a power series in molality added to the Debye-Hückel limiting law. The extended Pitzer equation and the Clegg-Pitzer-Brimblecombe equations give the best results in fitting the osmotic coefficient data. All three models are used to calculate ZnSO4 activity coefficients at 25°C in dilute solutions (<0.1 mol-kg−1) for comparison with published values.
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Miladinović, J., Ninković, R., Todorović, M. et al. Correlation of Osmotic Coefficient Data for ZnSO4(aq) at 25°C by Various Thermodynamic Models. Journal of Solution Chemistry 32, 371–383 (2003). https://doi.org/10.1023/A:1023710022173
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DOI: https://doi.org/10.1023/A:1023710022173