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Breakdown of the Rule of “Linearity of Water Isoactivity Lines” in a System Containing Solid Solutions

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Abstract

Osmotic coefficients of water have been measured isopiestically for the entire region of homogeneous ternary solutions for the Rb2SO4- (NH4)2SO4-H2O system at 25°C. One might expect that water isoactivity lines should be straight since this system involves a continuous series of solid solutions. The related systems (K2SO4-Rb2SO4-H2O and (K2SO4- (NH4)2 SO4-H2O) obey the “linearity of water isoactivity lines” rule. Contrary to expectations, the (Rb2SO4-(NH4)2-SO4-H2O appears to be the first water–salt system containing continuous solid solutions in which the mentioned rule is not obeyed.

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Authors
  1. Alexey V. Rumyantsev
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Rumyantsev, A.V. Breakdown of the Rule of “Linearity of Water Isoactivity Lines” in a System Containing Solid Solutions. Journal of Solution Chemistry 26, 97–103 (1997). https://doi.org/10.1023/A:1024441213243

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  • DOI: https://doi.org/10.1023/A:1024441213243

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