Thermodynamic Models for Correlation of Solubility of Hexaquocobalt(II) Bis(p-toluenesulfonate) in Liquid Mixtures of Water and Ethanol from 288.15 to 333.15 K

Response to “Comments on ‘Thermodynamic Models for Correlation of Solubility of Hexaquocobalt(II) Bis(p-toluenesulfonate) in Liquid Mixtures of Water and Ethanol from 288.15 to 333.15 K’”

“…The parameters of the CNIBS/R-K model and hybrid model published in this journal could predict the solubilities of Co(OTs) 2 Á6H 2 O at other solvent compositions when x 2 \ 0.342, in other words, it is suitable to obtain the solubilities of Co(OTs) 2 Á6H 2 O in water-rich binary solvent. The predictive power of the model was validated when T = 288.15 K at this time, and the procedure and method to measure the solubility data of Co(OTs) 2 Á6H 2 O was similar to our previous work [2,4]. The experimental results are listed in Table 1.…”

“…We have read it carefully and are particularly grateful to you for your hard work on this topic. In order to let other researchers and readers know better about our work, our explanations for the questions proposed by these comments are also given.In our recent paper [2] we reported the solubilities of hexaquocobalt(II) bis(p-toluenesulfonate) [Co(OTs) 2 Á6H 2 O] in water and ethanol mixtures containing molar fractions of 0-0.342 ethanol from 288.15 to 333.15 K using a synthetic method. The experimental data were correlated by the modified Apelblat equation, the Combined Nearly Ideal Binary Solvent Redlich-Kister (CNIBS/R-K) model, and a hybrid model that was a combination of the Jouyban-Acree and modified Apelblat models.…”

Comments on “Thermodynamic Models for Correlation of Solubility of Hexaquocobalt(II) Bis(p-toluenesulfonate) in Liquid Mixtures of Water and Ethanol from 288.15 to 333.15 K”

“…One of the goals for developing mathematical representations is to be able to make predictions at other solvent compositions and at other temperatures. To illustrate how limited the correlations reported by Yu et al [1] are in terms of predictive ability, we have substituted the numerical values of the equations given in Table 4 for T/ K = 288.15 into Eq. 1 above to obtain the following mathematical representation: …”

Comment on “Measurement and Correlation of the Solubility of Maltitol in Different Pure Solvents, Methanol–Water Mixtures, and Ethanol–Water Mixtures”

“…The models are commonly used in the chemical and pharmaceutical industries. In the past two years there have been several incorrect applications ,− of the models that have led to calculated mole fraction solubilities that have exceeded unity in one or both of the monosolvents used to prepare the binary solvent mixture. Several of the incorrect applications ,, have involved solubility studies in which the authors performed experimental measurements in a very narrow range of binary solvent composition.…”

“…In the past two years there have been several incorrect applications ,− of the models that have led to calculated mole fraction solubilities that have exceeded unity in one or both of the monosolvents used to prepare the binary solvent mixture. Several of the incorrect applications ,, have involved solubility studies in which the authors performed experimental measurements in a very narrow range of binary solvent composition. To prevent future occurrences we suggest that if possible research groups using the Combined NIBS/R-K and Jouyban–Acree models should perform solubility measurements over the entire range of binary solvent composition, including both monosolvents.…”