Thermodynamic investigation of the ternary mixed electrolyte (CoCl2+ CoSO4+ H2O) system by EMF measurements at T= 298.15 K

Pournaghdy, M.; Aghaie, H.; Monajjemi, Majid; Giahi, Masoud; Bagherinia, Mohammad A.

doi:10.1016/j.jct.2010.07.012

Cited by 19 publications

(17 citation statements)

References 26 publications

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“…In recent years, studies on the average activity coefficients of ions in mixed solutions have been reported extensively. For example, Pournaghdy et al studied the average activity coefficient of CoCl 2 in the CoCl 2 –CoSO 4 –H 2 O system by cell potential measurements at T = 298.15 K. Hu et al studied the average activity coefficient of CsCl in the CsCl–CaCl 2 –H 2 O system by cell potential measurements at T = 298.15 K. Bagherinia et al studied the mean activity coefficients of MgCl 2 in the MgCl 2 –MgSO 4 system by the potentiometric method at T = 298.15 K. At present, the most commonly used method to determine the average activity coefficient is based on the Pitzer model − and the cell potential method to form a liquid-free battery with ion-selective electrode and mixed electrolyte solution. In previous studies, Arvand et al studied the thermodynamics investigation of the ternary mixed electrolyte (NiCl 2 + NiSO 4 + H 2 O) system by the potentiometric method at T = 298.15 K. Deyhimi et al determined the average activity coefficient of NH 4 Cl at 298 K in the ternary NH 4 Cl–LiCl–H 2 O mixed electrolyte solution by the potentiometric method.…”

Section: Introductionmentioning

confidence: 99%

Average Activity Coefficients of NaBr in the Ternary System NaBr–Na₂SO₄–H₂O Determined by the Cell Potential Method at 318.15 K

Song

Sang

et al. 2021

J. Chem. Eng. Data

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In this paper, the cell potential method is used to determine the average activity coefficients of the NaBr–Na2SO4–H2O ternary system at 318.15 K. The ion-selective electrode and electrolyte solution are used to form a liquid-free battery. The ionic strength in the mixed solution is in the range 0.01–1.0 mol·kg–1 with different ionic strength fractions of Na2SO4, that is, y b = (0, 0.2, 0.4, 0.6, and 0.8). First, in a single salt solution, the response curve of Nernst can be obtained according to the Nernst equation. The standard cell potential E 0 = 251.03, electrode response slope k = 27.124, and linear correlation coefficient R 2 = 0.9998 are obtained in this work. In the same way, the average activity coefficients of NaBr in mixed electrolyte solution at 318.15 K were also determined by using the Nernst equation. Finally, the mixed ion interaction parameters θBr, SO4 and φNa, Br, SO4 of Pitzer equations can be fitted by the multilinear regression method combined with the average activity coefficients of mixed salt solution. In addition, the osmotic coefficients, water activity, excess Gibbs free energy, and activity coefficient of Na2SO4 can also be calculated using Pitzer equations based on the fitted θBr, SO4 and φNa, Br, SO4.

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Section: Introductionmentioning

confidence: 99%

Average Activity Coefficients of NaBr in the Ternary System NaBr–Na₂SO₄–H₂O Determined by the Cell Potential Method at 318.15 K

Song

Sang

et al. 2021

J. Chem. Eng. Data

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“…There are various complex electrolyte solutions in nature and in the process of human life and production, which are also an important part of chemical industry. , Among them, the studies of thermodynamic property of electrolyte solutions play a vital role in the chemical industry. Meanwhile, related scientific and technological fields have become research hotspots in the chemical engineering industry . Therefore, the theoretical studies of electrolyte solutions and the simulation of electrolyte process have important industrial practical value and theoretical significance.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, related scientific and technological fields have become research hotspots in the chemical engineering industry. 3 Therefore, the theoretical studies of electrolyte solutions and the simulation of electrolyte process have important industrial practical value and theoretical significance.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Studies of the Ternary System KCl–KI–H₂O at 298.15 K by the Cell Potential Method

et al. 2021

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In this article, the average activity coefficients of KCl in the KCl−KI−H 2 O ternary system at 298.15 K were determined using the cell potential method with a cell of a potassium-ion combination ion selective electrode (ISE) and a chlorineion combination ion selective electrode (ISE) without a liquid junction, Also, we chose the total ionic strength I range from 0.0100 to 1.0000 mol•kg −1 for different ionic strength fractions y b of KI with y b = (0.2, 0.4, 0.6, 0.8). The experimental results show that the mean activity coefficients of KCl can be calculated well by using the Pitzer models and Nernst equation. Furthermore, the mixing Pitzer ion interaction parameters of θ Cl, I and ψ K, I, Cl were fitted using Pitzer's equations, and the two parameters were applied to calculated the mean activity coefficients of KI in the KCl−KI−H 2 O ternary system. Accordingly, the osmotic coefficients, water activities, and excess Gibbs free energies in the mixtures were studied in this mixed system.

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“…The thermodynamic properties of electrolyte solutions are hotspots in the fields of geochemistry, biology, food processing, and environmental protection. − Studying of these electrolytes is fundamentally important to understand the properties and behavior of aqueous multicomponent systems. In recent decades, a series of models of ionic interaction in an electrolyte solution have been proposed to predict the ionic activity coefficient and the osmotic coefficient of each solute in the water system among which the most famous and influential model was proposed by Pitzer. − The Pitzer model plays an important role in calculating the ionic activity coefficient and the osmotic coefficient of a solute in solution.…”

Section: Introductionmentioning

confidence: 99%

Mean Ionic Activity Coefficients of NaBr in the Ternary System NaBr–SrBr₂–H₂O at 288.15 K using the Cell Potential Method

Xing

Zhao

Sang³

et al. 2020

J. Chem. Eng. Data

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In this paper, a sodium ion selective electrode (Na-ISE) and a bromide ion selective electrode (Br-ISE) were used to form a liquid-free potential reversible battery: Na-ISE|NaBr (m 1 ) and SrBr 2 (m 2 )|Br-ISE. The mean ionic activity coefficients of NaBr in the ternary system NaBr− SrBr 2 −H 2 O at 288.15 K were determined using the cell potential method. In this system, the total ionic strength, I, ranges from 0.0100 up to 2.0000 mol • kg −1 for different ionic strength fractions y b of SrBr 2 , that is, y b = (0.0, 0.2, 0.4, 0.6, and 0.8). The results show that Na-ISE and Br-ISE have a great Nernst effect. The mean ionic activity coefficients of NaBr in NaBr− SrBr 2 −H 2 O were calculated using the Nernst equation, and the cell potential values were measured. The Pitzer ion interaction parameters θ Na + • Sr 2+ and ψ Na + • Sr 2+ • Br − were fitted using the Pitzer model, and experimental results in this work, and the mean ionic activity coefficients of SrBr 2 at 288.15 K were also calculated according to the Pitzer model. Finally, the osmotic coefficient Φ, water activity a w , and excess Gibbs energy G E of the ternary system were also calculated.

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Thermodynamic investigation of the ternary mixed electrolyte (CoCl2+ CoSO4+ H2O) system by EMF measurements at T= 298.15 K

Cited by 19 publications

References 26 publications

Average Activity Coefficients of NaBr in the Ternary System NaBr–Na₂SO₄–H₂O Determined by the Cell Potential Method at 318.15 K

Average Activity Coefficients of NaBr in the Ternary System NaBr–Na₂SO₄–H₂O Determined by the Cell Potential Method at 318.15 K

Thermodynamic Studies of the Ternary System KCl–KI–H₂O at 298.15 K by the Cell Potential Method

Mean Ionic Activity Coefficients of NaBr in the Ternary System NaBr–SrBr₂–H₂O at 288.15 K using the Cell Potential Method

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Thermodynamic investigation of the ternary mixed electrolyte (CoCl2+ CoSO4+ H2O) system by EMF measurements at T= 298.15 K

Cited by 19 publications

References 26 publications

Average Activity Coefficients of NaBr in the Ternary System NaBr–Na2SO4–H2O Determined by the Cell Potential Method at 318.15 K

Average Activity Coefficients of NaBr in the Ternary System NaBr–Na2SO4–H2O Determined by the Cell Potential Method at 318.15 K

Thermodynamic Studies of the Ternary System KCl–KI–H2O at 298.15 K by the Cell Potential Method

Mean Ionic Activity Coefficients of NaBr in the Ternary System NaBr–SrBr2–H2O at 288.15 K using the Cell Potential Method

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Average Activity Coefficients of NaBr in the Ternary System NaBr–Na₂SO₄–H₂O Determined by the Cell Potential Method at 318.15 K

Average Activity Coefficients of NaBr in the Ternary System NaBr–Na₂SO₄–H₂O Determined by the Cell Potential Method at 318.15 K

Thermodynamic Studies of the Ternary System KCl–KI–H₂O at 298.15 K by the Cell Potential Method

Mean Ionic Activity Coefficients of NaBr in the Ternary System NaBr–SrBr₂–H₂O at 288.15 K using the Cell Potential Method