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Received May 5, 2016
Accepted August 29, 2016
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Solubility and dissolution thermodynamics of hexaquoiron(III)tris(p-toluenesulfonate) in (ethanol+water) binary mixtures within 291.15-333.15 K
Institute of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
zengzx@ecust.edu.cn
Korean Journal of Chemical Engineering, January 2017, 34(1), 206-213(8), 10.1007/s11814-016-0247-7
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Abstract
The solubility of hexaquoiron(III)tris(p-toluenesulfonate) [Fe(OTs)3·6H2O] in (ethanol+water) mixtures with a mole fraction of 0-0.327 ethanol was measured from 291.15 to 333.15 K by using a synthetic method. The experimental results show that the solubility of Fe(OTs)3·6H2O increases with an increase in temperature and an enrichment in ethanol content. The solubility data were correlated by the modified Apelblat equation, the Redlich-Kister (CNIBS/R-K) model, and the hybrid model, and the results showed that the three models agree well with experimental data. The thermodynamic properties of the dissolution process, including enthalpy, entropy, and Gibbs energy were estimated from the experimental data by the modified van’t Hoff equation, indicating that the process of the dissolution of Fe(OTs)3·6H2O is endothermic and spontaneous.
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References
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