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Apparent Molar Volumes of Aqueous Solutions of Magnesium Tetraborate from 283.15 to 363.15 K and 0.1 MPa

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Abstract

Densities for aqueous solutions of magnesium tetraborate MgB4O7(aq) at the molalities of (0.00556–0.03341) mol·kg−1 were measured with an Anton Paar Digital vibrating-tube densimeter at temperature intervals of 5 K from 283.15 to 363.15 K and 0.1 MPa. Apparent molar volumes were obtained based on the experimental density data, and the 3D diagrams of the apparent molar volume (V ϕ ) of MgB4O7(aq) against temperature (T) and molality (m) were plotted. On the basis of the Vogel–Tamman–Fulcher equation, the coefficients of the correlation equation for densities of MgB4O7(aq) against temperature and molality were parameterized. According to the Pitzer ion-interaction model of the apparent molar volume, the temperature correlation equations of Pitzer single-salt parameters F(i,p,T) = a0 + a1 × T + a2 × T 2 + a3/T + a4 × ln(T) + a5 × T 3 (where T is temperature in Kelvin, a i are model parameters) for MgB4O7 were obtained for the first time.

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Acknowledgements

Financial supports from the National Natural Science Foundation of China (U1607123 and 21773170), the Yangtze Scholars and Innovative Research Team in University of Ministry of Education of China (IRT_17R81) and the Chinese Postdoctoral Science Foundation (2016M592827) are acknowledged.

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Authors and Affiliations

  1. Tianjin Key Laboratory of Marine Resources and Chemistry, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, 300457, People’s Republic of China

    Kaiyu Zhao, Long Li, Jing Li, Yafei Guo, Yuanhui Liu & Tianlong Deng

  2. College of Chemistry and Materials Science, Northwest University, Xi’an, 710127, People’s Republic of China

    Yafei Guo

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  1. Kaiyu Zhao
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  2. Long Li
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  3. Jing Li
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  4. Yafei Guo
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  5. Yuanhui Liu
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  6. Tianlong Deng
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Correspondence to Yafei Guo.

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Zhao, K., Li, L., Li, J. et al. Apparent Molar Volumes of Aqueous Solutions of Magnesium Tetraborate from 283.15 to 363.15 K and 0.1 MPa. J Solution Chem 47, 827–837 (2018). https://doi.org/10.1007/s10953-018-0761-9

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  • DOI: https://doi.org/10.1007/s10953-018-0761-9

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