J. Chem. Eng. Data 1996, 41, 455-467
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Osmotic and Activity Coefficients of Aqueous (NH4)2SO4 as a Function of Temperature, and Aqueous (NH4)2SO4-H2SO4 Mixtures at 298.15 K and 323.15 K Simon L. Clegg,*,† Stephania Milioto,‡,§ and Donald A. Palmer*,‡ Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6110, and School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, U.K.
Osmotic coefficients of (NH4)2SO4(aq), and aqueous (NH4)2SO4-H2SO4 mixtures at 298.15 K and 323.15 K, and H2SO4(aq) at 323.15 K have been determined by an isopiestic method. Using the Pitzer molalitybased thermodynamic model, the measurements are combined with other literature data to obtain osmotic and activity coefficients of, first, (NH4)2SO4(aq) from
