Determination of water activity, osmotic coefficients, activity coefficients, solubility and excess Gibbs free energies of NaCl-sucrose-H2O mixture at 298.15 K

Messnaoui, Brahim; Mounir, Abdelfetah; Dinane, Abderrahim; Samaouali, Abderrahim; Mounir, Bahija

doi:10.1016/j.molliq.2019.03.156

Cited by 17 publications

(16 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, Dinane et al proposed a simple mixing relation called the ECA “Extended Composed Additivity” model to estimate the water activity in mixed electrolyte solutions. The proposed equation was used for the aqueous mixture of an electrolyte and nonelectrolyte . In the case of the studied system GBP/water/DES, this equation is given by: a normalw = prefix− 1 + a normalw ( GBP ) + a normalw ( DES ) − m GBP m DES λ − m GBP m DES m δ where m GBP , m DES , and a w(GBP) , a w(DES) are the molalities of GBP and DES and their water activities in the binary solutions, respectively.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Osmotic Coefficients of Gabapentin Drug in Aqueous Solutions of Deep Eutectic Solvents: Experimental Measurements and Thermodynamic Modeling

et al. 2023

View full text Add to dashboard Cite

Most of the applications for aqueous deep eutectic solvent (DES) solutions are directly related to molecular interactions, which can be studied using thermodynamic properties. In this regard, the activity coefficient and osmotic coefficient studies have provided evidence for understanding the depth of ion pair formation, ion solvent, and ion–ion interactions in solutions. In this study, the osmotic coefficients for binary gabapentin (GBP)/water and ternary GBP/DES (ChCl/EG and ChCl/U) aqueous solutions were calculated using vapor pressure osmometry measurements at T = 298.15 K and pressure 872 hPa. Water activities, osmotic coefficients, and vapor pressure depressions were all calculated for binary solutions. The Pitzer equation was used to correlate the osmotic coefficient values. Activity coefficients for GBP in the binary systems were determined by the obtained parameters of this equation. The standard deviation for the osmotic coefficient value in the binary system with the Pitzer equation is 0.0059. In ternary solutions, two different DES concentrations (about molality 1 and 3) were used to investigate the effect of concentration on osmotic coefficients. For ternary solutions, it was also possible to obtain quantities like water activity and osmotic coefficient data. Finally, the predicted values of water activity using the Lin and ECA models were applied to compare the results of water activity in the studied systems. The results showed that the ECA and Lin models have 0.00045 and 0.0011 average standard deviation, respectively.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The proposed equation was used for the aqueous mixture of an electrolyte and nonelectrolyte. 46 In the case of the studied system GBP/water/DES, this equation is given by:…”

Section: Eca Modelmentioning

confidence: 99%

Osmotic Coefficients of Gabapentin Drug in Aqueous Solutions of Deep Eutectic Solvents: Experimental Measurements and Thermodynamic Modeling

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Thus, given the importance of phosphate fertilizers, we are interested in this study in the influence of the presence of an electrolyte salt on the physicochemical properties of alkali metal phosphates. The aim of this study is to investigate some physicochemical properties for the mixture of KBr and KH 2 PO 4 in aqueous solutions by the hygrometric method − at the temperature of 298.15 K. Water activities were measured for various ionic-strength fractions y of KH 2 PO 4 ( y = I KBr /[ I KH2PO4 + I KBr ]) of 0, 1/4, 1/3, 1/2, 2/3, 3/4, and 1, with the total molality between 0.1 mol·kg –1 and saturation. The water activities were used to evaluate the osmotic coefficients.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Properties Data of Ternary System KBr–KH₂PO₄–H₂O at 298.15 K

et al. 2023

Self Cite

View full text Add to dashboard Cite

The OCP Group located in Morocco in Africa is one of the biggest producers of phosphates and fertilizers in the world and delivers products to more than 165 clients on five continents. These products include ammonium and di-ammonium phosphate, sodium phosphate, and others with added micronutrients (potassium–calcium–nitrogen) that are designed to effectively feed degraded soil. OCP has launched a new strategy in Africa called “Green Africa” to transform African agriculture and make it a platform for food production. Therefore, with the aim of developing new fertilizers and increasing the yield of soils and agriculture, we are interested in this work to study the influence of electrolytes on the fertilizer phosphate KBr–KH2PO4–H2O. This system was investigated with our developed hygrometric method at 298.15 K. The thermodynamic parameters of the studied system such as the water activity and osmotic coefficient are determined by measuring the relative humidity at various total molalities from 0.2 mol·kg–1 to about saturation, and for different ionic-strength fractions y of KH2PO4 (y = I KBr/(I KH2PO4+I KBr)) of 0, 1/4, 1/3, 1/2, 2/3, 3/4, and 1. The obtained measurements are compared to four models such the Dinane (ECA), Lin et al., Robinson and Stokes (RS), and Leitzke-Stoughton (LS II) equations. The solubilities of KBr and KH2PO4 in their aqueous mixture are also measured at 298.15 K. The solid state was characterized using powder X-ray diffraction (XRD). The PSC model was used to correlate the results and to predict the solute activity coefficients, excess Gibbs energy, and solubilities of the components in the mixture.

show abstract

“…In the present work we have determined the water activity, osmotic coefficient, and saturation point of an aqueous solution of K 2 HPO 4 / d -sucrose/water mixtures, in the K 2 HPO 4 concentration range of 0.1 to 6.0 mol·kg –1 , and the d -sucrose molality varying from 0.1 to 6.0 mol·kg –1 . These data are obtained by measuring the relative humidities of the K 2 HPO 4 / d -sucrose/water mixture using the hygrometric method that we developed in our previous works. − Crystalline solids formed from supersaturated water/ d -sucrose/KDP with varying sucrose and K 2 HPO 4 concentrations can be detected using ATR-FTIR and X-ray methods. To determine the remaining thermodynamic properties of this aqueous mixture, we used the widely employed CSP model for calculating the activity coefficient and phase equilibria of electrolyte systems.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics of K₂HPO₄/d-Sucrose/Water System at 298.15 K: Experiment and Modeling

et al. 2023

Self Cite

View full text Add to dashboard Cite

Thermodynamic properties of K 2 HPO 4 /D-sucrose/water ternary solutions were investigated at 298.15 K. Water activity, osmotic coefficient, and electrolyte saturation points are determined by measuring relative humidities in the wide range of K 2 HPO 4 molality (ranging from 0.1 to approximately 5 mol•kg −1 ) and for various D-sucrose contents (0.1, 0.3, 0.5, 1, 2, 3, 4, 5, and 5.5 mol•kg −1 ) in the ternary K 2 HPO 4 /D-sucrose/water system. The solid state was characterized using powder X-ray diffraction (XRD) and attenuated total reflection Fourier-transform infrared (ATR-FTIR) techniques. The obtained data were then analyzed using the Pitzer-Simonson-Clegg (PSC) model to determine several thermodynamic properties. These properties encompass the stoichiometric ionic mean activity coefficient of K 2 HPO 4 , excess Gibbs energy, solubility in aqueous solutions, and the Gibbs energy of transfer of K 2 HPO 4 between water (W) and D-sucrose/water (W+S) mixtures. Furthermore, the interactions among water, D-sucrose, and K 2 HPO 4 are also examined and discussed.

show abstract

Determination of water activity, osmotic coefficients, activity coefficients, solubility and excess Gibbs free energies of NaCl-sucrose-H2O mixture at 298.15 K

Cited by 17 publications

References 44 publications

Osmotic Coefficients of Gabapentin Drug in Aqueous Solutions of Deep Eutectic Solvents: Experimental Measurements and Thermodynamic Modeling

Osmotic Coefficients of Gabapentin Drug in Aqueous Solutions of Deep Eutectic Solvents: Experimental Measurements and Thermodynamic Modeling

Thermodynamic Properties Data of Ternary System KBr–KH₂PO₄–H₂O at 298.15 K

Thermodynamics of K₂HPO₄/d-Sucrose/Water System at 298.15 K: Experiment and Modeling

Contact Info

Product

Resources

About

Determination of water activity, osmotic coefficients, activity coefficients, solubility and excess Gibbs free energies of NaCl-sucrose-H2O mixture at 298.15 K

Cited by 17 publications

References 44 publications

Osmotic Coefficients of Gabapentin Drug in Aqueous Solutions of Deep Eutectic Solvents: Experimental Measurements and Thermodynamic Modeling

Osmotic Coefficients of Gabapentin Drug in Aqueous Solutions of Deep Eutectic Solvents: Experimental Measurements and Thermodynamic Modeling

Thermodynamic Properties Data of Ternary System KBr–KH2PO4–H2O at 298.15 K

Thermodynamics of K2HPO4/d-Sucrose/Water System at 298.15 K: Experiment and Modeling

Contact Info

Product

Resources

About

Determination of water activity, osmotic coefficients, activity coefficients, solubility and excess Gibbs free energies of NaCl-sucrose-H2O mixture at 298.15 K

Thermodynamic Properties Data of Ternary System KBr–KH₂PO₄–H₂O at 298.15 K

Thermodynamics of K₂HPO₄/d-Sucrose/Water System at 298.15 K: Experiment and Modeling