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Volumetric Studies on Aqueous Lithium Pentaborate Solution from 288.15 to 323.15 K

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Abstract

Densities for aqueous lithium pentaborate solutions at the molalities of (0.011–0.976) mol kg−1 were measured with an Anton Paar Digital vibrating-tube densimeter at temperature intervals of 5 K from 288.15 to 323.15 K. The coefficient of thermal expansion (α), apparent molar volume (\({{\varphi }_{V}}\)), apparent molar expansibility (\({{\varphi }_{E}}\)) and limiting apparent molar expansibility (\(\varphi _{{\text{E}}}^{0}\)) were obtained based on the experimental density data. On the basis of the Vogel–Tamman–Fulcher equation, the coefficients of the correlation equation for densities of LiB5O8(aq) against temperature and molality were parameterized. The results suggest a strong solute-solvent interaction in the solution, and lithium pentaborate is classified as a “structure breaking” solute. As temperatures rise, the hydrophilic character becomes unapparent.

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Funding

This project was supported by the Natural Science Foundation of China (nos. U1707601 and 41503061).

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Authors and Affiliations

  1. Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, 810008, Xining, PR China

    Hai-wen Ge &  Min Wang

  2. Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, 810008, Xining, PR China

    Hai-wen Ge &  Min Wang

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  1. Hai-wen Ge
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Hai-wen Ge, Min Wang Volumetric Studies on Aqueous Lithium Pentaborate Solution from 288.15 to 323.15 K. Theor Found Chem Eng 56, 388–394 (2022). https://doi.org/10.1134/S004057952203006X

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