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Isopiestic Measurement of the Osmotic Coefficients of Aqueous {xH 2 SO 4 + (1− x)Fe 2 (SO 4 ) 3 } Solutions at 298.15 and 323.15 K

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Abstract

This study measures the osmotic coefficients of {xH2SO4 + (1−x)Fe2(SO4)3}(aq) solutions at 298.15 and 323.15 K that have ionic strengths as great as 19.3 mol,kg−1, using the isopiestic method. Experiments utilized both aqueous NaCl and H2SO4 as reference solutions. Equilibrium values of the osmotic coefficient obtained using the two different reference solutions were in satisfactory internal agreement. The solutions follow generally the Zdanovskii empirical linear relationship and yield values of a w for the Fe2(SO4)3–H2O binary system at 298.15 K that are in good agreement with recent work and are consistent with other M2(SO4)3–H2O binary systems.

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Authors and Affiliations

  1. Department of Geosciences, University of Nebraska, Lincoln, Nebraska, USA, 68588-0340

    Mariano Velázquez-Rivera & Richard M. Kettler

  2. Chemical Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee, USA, 37831-6110

    Donald A. Palmer

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  1. Mariano Velázquez-Rivera
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  2. Donald A. Palmer
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Velázquez-Rivera, M., Palmer, D.A. & Kettler, R.M. Isopiestic Measurement of the Osmotic Coefficients of Aqueous {xH 2 SO 4 + (1− x)Fe 2 (SO 4 ) 3 } Solutions at 298.15 and 323.15 K. J Solution Chem 35, 1699–1730 (2006). https://doi.org/10.1007/s10953-006-9091-4

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  • DOI: https://doi.org/10.1007/s10953-006-9091-4

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