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首页> 外文期刊>Fluid Phase Equilibria >Individual activity coefficients of chloride ions in aqueous solutions of MgCl2, CaCl2 and BaCl2 at 298.2 K
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Individual activity coefficients of chloride ions in aqueous solutions of MgCl2, CaCl2 and BaCl2 at 298.2 K

机译：MgCl2，CaCl2和BaCl2水溶液中氯离子在298.2 K时的单个活度系数

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The activity coefficients of the individual chloride ions were measured at 298.2 K using a chloride ion selective electrode in aqueous solutions of MgCl2 and CaCl2 up to 3m and BaCl2 up to 1.4m. For these 2:1 electrolytes, the activity coefficients of magnesium, calcium and barium were calculated using values of the mean ionic activity coefficients of the salts. At low electrolyte concentrations, the activity coefficients of the cation are smaller than that of the anion and at higher concentrations the trend is reversed. These results are different from those reported for 1:1 and 1:2 electrolyte solutions studied previously. The activity coefficient of the chloride ion has similar behavior and similar values with Mg2+, Ca2+ or Ba2+ as counterions. Two different methods were used to evaluate the activity coefficients of the individual chloride ions from the emf measurements and the results were undistinguishable within the experimental error. The activity coefficient of the individual ions were correlated with the Khoshkbarchi-Vera equation values and compared with the values obtained from the hydration theory of Bates. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 18]
机译：使用氯离子选择性电极，在MgCl2和CaCl2水溶液（至多3m）和BaCl2（溶液至多1.4m）的水溶液中，在298.2 K下测量各个氯离子的活度系数。对于这些2：1电解质，使用盐的平均离子活度系数值计算镁，钙和钡的活度系数。在低电解质浓度下，阳离子的活度系数小于阴离子，而在高浓度下趋势则相反。这些结果与先前研究的1：1和1：2电解质溶液报道的结果不同。氯离子的活度系数具有相似的行为，并且以Mg2 +，Ca2 +或Ba2 +作为抗衡离子具有相似的值。两种不同的方法被用来评估电动势测量中各个氯离子的活度系数，结果在实验误差范围内是无法区分的。各个离子的活度系数与Khoshkbarchi-Vera方程值相关，并与从贝茨的水化理论获得的值进行比较。 （C）2001 Elsevier Science B.V.保留所有权利。 [参考：18]

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