Abstract
The isopiestic method is one of the most accurate methods for solubility determinations; an additional advantage is that solvent activity can be simultaneously determined for the saturated solution. In spite of this the method is rarely used for that purpose, and then almost exclusively for aqueous solutions at 25°C. This method is described, and its advantages and disadvantages discussed. Examples are given of the application of this method to solubility determinations, and new data are presented for the aqueous solubilities of Pr(NO3)3, Ho(NO3)3, Er(NO3)3, and Y(NO3)3 at 25°C. These new data are designed to refine results recently reviewed in the IUPAC Solubility Data Series.
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Presentation to First International Symposium on Solubility Phenomena, University of Western Ontario, London, Ontario, August 21–23, 1984.
Work performed under the auspices of the U.S.Department of Energy by the Lawrence Livermore National Laboratory under contract number W-7405-ENG-48.
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Rard, J.A. Solubility determinations by the isopiestic method and application to aqueous lanthanide nitrates at 25°C. J Solution Chem 14, 457–471 (1985). https://doi.org/10.1007/BF00646978
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DOI: https://doi.org/10.1007/BF00646978