Isopiestic study of mixed electrolyte solution {yCuCl₂ + (1 鈭?#xa0;y)CaCl₂} in ethanol at T = 298.15 K

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• 作者：Seyed Masood Seyed Ahmadian ; ^{s.m.ahmadian@gmail.com} ; Jafar Azamat ; Maryam Atabay
• 关键词：Osmotic coefficient ; Vapor pressure ; Isopiestic ; Mixed electrolyte solution ; Ethanol
• 刊名：Fluid Phase Equilibria
• 出版年：2012
• 期刊代码：32_03783812
• 类别：ce
• 出版时间：25 May, 2012
• 卷：322-323
• 期：Complete
• 页码：1-8
• 文件大小：436 K

摘要

In this research, osmotic coefficients of the solutions of CuCl₂ + CaCl₂ in ethanol at T = 298.15 K were measured using isopiestic technique. The experimental osmotic coefficients were used for evaluating the solvent activities and the vapor pressures of the solutions. The solvent activity coefficients were predicted using the ion interaction model of Pitzer and electrolyte non-random two liquid (e-NRTL) model of Chen. The capabilities of the models have been discussed on the basis of standard deviations in osmotic coefficients.

The results show that the considered models predict the experimental data in a reasonable level. The role of ternary interaction parameters on the fitting capability of the models has also been discussed. The mean ionic activity coefficients of the studied solute have also been calculated using the above mentioned models. The calculated mean ionic activity coefficients are in good consistency with each other.