Abstract
The ionization constants of 2,4-dinitrophenol were measured in water-dimethylsulphoxide solvent mixtures at five temperatures ranging from 20 to 40°C. The enthalpy and entropy contributions to the ionization process are discussed. The results indicate that in water-rich solvent mixtures the ionization process is controlled by the entropy factor while in the dimethylsulphoxide-rich solvent mixtures it is controlled by the enthalpy factor.
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Siow, KS., Ang, KP. Thermodynamics of ionization of 2,4-dinitrophenol in water-dimethylsulfoxide solvents. J Solution Chem 18, 937–947 (1989). https://doi.org/10.1007/BF00647894
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DOI: https://doi.org/10.1007/BF00647894