Equilibrium Solubility of Sodium 1-Naphthalenesulfonate in Binary NaCl + Water, Na2SO4 + Water, and C2H5OH + Water Solvent Mixtures from (278.15 to 323.15) K

2015 ◽  
Vol 60 (3) ◽  
pp. 509-513 ◽  
Author(s):  
Rongrong Li ◽  
Jian Wan ◽  
Yingjie Zhang ◽  
Danxia Liang ◽  
Bin Zhang ◽  
...  
Keyword(s):  
Solvent Mixtures ◽  
Equilibrium Solubility ◽  
Water Solvent

scholarly journals Solubility, Solution Thermodynamics, and Preferential Solvation of Amygdalin in Ethanol + Water Solvent Mixtures

2020 ◽  
Vol 13 (11) ◽  
pp. 395
Author(s):  
Abdelkarim Aydi ◽  
Cherifa Ayadi ◽  
Kaouther Ghachem ◽  
Abdulaal Al-Khazaal ◽  
Daniel Delgado ◽  
...  
Keyword(s):  
Standard Gibbs Energy ◽  
Preferential Solvation ◽  
Solubility Data ◽  
Driving Mechanism ◽  
Standard Entropy ◽  
Solvent Mixtures ◽  
Equilibrium Solubility ◽  
Water Solvent ◽  
Solvation Parameters ◽  
Rich Mixtures

The equilibrium solubility of amygdalin in [ethanol (1) + water (2)] mixtures at 293.15 K to 328.15 K was reported. The thermodynamic properties (standard enthalpy ΔsolnH°, standard entropy ΔsolnS°, and standard Gibbs energy of solution ΔsolnG°) were computed using the generated solubility data via van’t Hoff and Gibbs equations. The dissolution process of amygdalin is endothermic and the driving mechanism in all mixtures is entropy. Maximal solubility was achieved in 0.4 mole fraction of ethanol at 328.15 K and the minimal one in neat ethanol at 293.15 K. Van’t Hoff, Jouyban–Acree–van’t Hoff, and Buchowski–Ksiazczak models were used to simulate the obtained solubility data. The calculated solubilities deviate reasonably from experimental data. Preferential solvation parameters of amygdalin in mixture solvents were analyzed using the inverse Kirkwood–Buff integrals (IKBI) method. Amygdalin is preferentially solvated by water in ethanol-rich mixtures, whereas in water-rich mixtures, there is no clear evidence that determines which of water or ethanol solvents would be most likely to solvate the molecule.

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