Thermodynamic study of the quaternary electrolyte (NaCl+NaNO3+HCONH2+H2O) system using potentiometric measurements at T=(298.2 and 303.2)K

Ghalami‐Choobar, Bahram; Sayyadi-Nodehi, Fatemeh

doi:10.1016/j.jct.2012.01.014

Cited by 18 publications

(11 citation statements)

References 15 publications

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“…Moreover, Figure demonstrates a plot of osmotic coefficients against the total molal of electrolyte and in the same manner as can be seen in references for the similar systems. , Obviously, the decreasing trend may be due to the overwhelming ion–ion and ion–solvent interactions, and for the latter case, the preferential solvation emerges, and to the knowledge of author, for quaternary systems, it has not been modeled yet. Finally, Figure shows the decreasing trend for the excess Gibbs free energy versus total molalities; this trend is ordinarily in agreement with similar systems. − …”

Section: Resultssupporting

confidence: 85%

Quaternary System Thermodynamic Investigation in a Mixed Solvent: NaCl + KCl + N,N-Dimethylformamide + H₂O

Masumi

Salamat-Ahangari

2021

J. Chem. Eng. Data

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This article focuses on measuring and modeling activity coefficients and some thermodynamic properties of the quaternary system (NaCl + KCl + N,N-dimethylformamide (DMF) + H 2 O) using a potentiometric technique at (298.15 ± 0.05) K. By employing ion-selective electrodes (Na + -ISE, Cl − -ISE), experimental results were collated for the four series of the mixed electrolyte systems in various ionic strengths for the investigated quaternary system. The electrochemical measurements were carried out over total ionic strengths range from 0.0249 up to about 3.8223 mol•kg −1 in mixed N,N-dimethylformamide + H 2 O solvents, with various solvent mass percents (wt % = 0.0, 0.10, 0.20, and 0.30) at 298.15 ± 0.05 K. Experimental data were modeled on the basis of the Pitzer approach, and the two and three particles mixing ionic interaction parameters (θ NaK and ψ NaKCl ) estimated for the quaternary electrolyte systems under investigation. Finally, using the optimized parameters (θ NaK and ψ NaKCl ), the thermodynamic properties of electrolyte systems, such as activity coefficients of the constituent's electrolyte, osmotic coefficients, and the excess Gibbs free energy, were determined for each mass percent of DMF in water for mixtures of sodium and potassium salts with common anion chloride. The resultant activity coefficients demonstrate a decreasing trend upon decreasing dielectric constants and as the mixed solvent medium growing dense and viscous.

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Section: Resultssupporting

confidence: 85%

Quaternary System Thermodynamic Investigation in a Mixed Solvent: NaCl + KCl + N,N-Dimethylformamide + H₂O

Masumi

Salamat-Ahangari

2021

J. Chem. Eng. Data

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“…Measuring and modeling for electrolyte behavior in aqueous and nonaqueous media is necessary because of the need to investigate the nature of various industrial and environmental processes. Despite the successful achievements of mixed electrolyte studies in aqueous media, investigations in nonaqueous or in mixed solvent media are still very limited. − Among the proposed equations, the Pitzer model and the Harned rule seemed to be the most favored ones among the published works. Typically some of the literature used the Harned rule, − while the others implemented the Pitzer formalism. − …”

Section: Introductionmentioning

confidence: 99%

Mixed Electrolyte in Mixed Solvent: Activity Coefficient Measuring and Modeling for the HCl + NaCl + Methanol + Water System

Karimzadeh

Hosseini

2019

J. Chem. Eng. Data

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The emf of the cell is measured to investigate the HCl + NaCl + H2O + CH3OH mixed electrolyte systems. The experimental data are obtained over the electrolyte molality ranging from 0.005 mol kg–1 up to about 3.5 mol kg–1, at 298.15 ± 0.01 K, by using a cell containing a pH and a silver chloride electrode in different alcohol mass fractions x(CH3OH) in H2O (where x = 0.10, 0.20, 0.30, 0.40, and 0.50). The mean activity coefficients of HCl in the mixtures are computed. Modeling is implemented by the classical Pitzer (CP) equation and original Pitzer (OP) equation that are included by the additional terms which are arising from interactions of neutral species and finally the modified Pitzer equation by Merida et al. (MP). The different aspects of proper parameter choosing in fitting processes especially for pure and mixed electrolytes in mixed solvent systems are signified in the results.

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“…The sodium ion-selective electrode was prepared in accordance with the general procedure of PVC membrane construction which has been reported in the previous works [17,18]. Also, the Ag-AgCl wire electrodes were prepared essentially as described elsewhere by electrolysis [19].…”

Section: Preparation Of Electrodes and Data Acquisitionmentioning

confidence: 99%

“…In our previous papers, we reported the ability of the solvent polymeric membrane electrode for determination of activity coefficient for binary, ternary and quaternary electrolyte solutions [15][16][17]. In the present study, the results relating to the thermodynamic properties for the ternary mixture of (NaCl + Na 2 HPO 4 + water) using the potentiometric method are reported at T = 298.2 K. The potentiometric measurements reported in this work were carried out on a galvanic cell containing a solvent polymeric (PVC) Na-ISE and Ag-AgCl electrodes and using various series of this mixed salt electrolyte system, over the ionic strength ranging from ð0:0130 to 4:000Þmol Á kg À1 .…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic properties determination of ternary mixture (NaCl+Na2HPO4+water) using potentiometric measurements

Ghalami‐Choobar

Mahmoodi

Mossayyebzadeh-Shalkoohi

2013

The Journal of Chemical Thermodynamics

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Thermodynamic study of the quaternary electrolyte (NaCl+NaNO3+HCONH2+H2O) system using potentiometric measurements at T=(298.2 and 303.2)K

Cited by 18 publications

References 15 publications

Quaternary System Thermodynamic Investigation in a Mixed Solvent: NaCl + KCl + N,N-Dimethylformamide + H₂O

Quaternary System Thermodynamic Investigation in a Mixed Solvent: NaCl + KCl + N,N-Dimethylformamide + H₂O

Mixed Electrolyte in Mixed Solvent: Activity Coefficient Measuring and Modeling for the HCl + NaCl + Methanol + Water System

Thermodynamic properties determination of ternary mixture (NaCl+Na2HPO4+water) using potentiometric measurements

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Thermodynamic study of the quaternary electrolyte (NaCl+NaNO3+HCONH2+H2O) system using potentiometric measurements at T=(298.2 and 303.2)K

Cited by 18 publications

References 15 publications

Quaternary System Thermodynamic Investigation in a Mixed Solvent: NaCl + KCl + N,N-Dimethylformamide + H2O

Quaternary System Thermodynamic Investigation in a Mixed Solvent: NaCl + KCl + N,N-Dimethylformamide + H2O

Mixed Electrolyte in Mixed Solvent: Activity Coefficient Measuring and Modeling for the HCl + NaCl + Methanol + Water System

Thermodynamic properties determination of ternary mixture (NaCl+Na2HPO4+water) using potentiometric measurements

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Product

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Quaternary System Thermodynamic Investigation in a Mixed Solvent: NaCl + KCl + N,N-Dimethylformamide + H₂O

Quaternary System Thermodynamic Investigation in a Mixed Solvent: NaCl + KCl + N,N-Dimethylformamide + H₂O