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Measurement and thermodynamic model study on equilibrium solubility in the ternary system KCl-KBr-H2O at 323.15 K

  • Chemical Thermodynamics and Thermochemistry
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Abstract

The solubilities and the refractive indices of the KCl-KBr-H2O system at 323.15 K were studied with the isothermal dissolution method. The phase diagram and refractive index diagram were plotted for this system at 323.15 K. There is only one crystallization field of the solid solution K(Cl, Br). The system belongs to the solid solution type. The refractive indices of the equilibrium solution varies regularly with w(KCl) increasing. The calculated refractive index data are in good agreement with the experimental data. The parameter ΨK, Cl, Br at 323.15 K was fitted using the measured solubility data in this study. The equilibrium constant equation for the equilibrium solids at 323.15 K were obtained using the different Pitzer parameters from the literature or this work with a method using the activity product constant. The calculated solubilities agree well with experimental values.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Linyi University, Linyi, 276000, China

    Ling-Zong Meng, Dan Li, Cun-Yun Ma & Kai-Xuan Liu

  2. Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin, 300457, China

    Ling-Zong Meng

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  1. Ling-Zong Meng
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  2. Dan Li
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  3. Cun-Yun Ma
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  4. Kai-Xuan Liu
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Correspondence to Ling-Zong Meng.

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Meng, LZ., Li, D., Ma, CY. et al. Measurement and thermodynamic model study on equilibrium solubility in the ternary system KCl-KBr-H2O at 323.15 K. Russ. J. Phys. Chem. 88, 2283–2288 (2014). https://doi.org/10.1134/S0036024414130135

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  • DOI: https://doi.org/10.1134/S0036024414130135

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