Re-evaluation of the Activity Coefficients of Aqueous Hydrochloric Acid Solutions up to a Molality of 16.0 mol·kg−1 Using the Hückel and Pitzer Equations at Temperatures from 0 to 50 °C

被引:0
作者
Jaakko I. Partanen
Pekka M. Juusola
Kari P. Vahteristo
António J. G. de Mendonça
机构
[1] Lappeenranta University of Technology,Department of Chemical Technology
[2] University of Beira Interior,Research Center of Health Sciences and Chemistry Department
来源
Journal of Solution Chemistry | 2007年 / 36卷
关键词
Activity coefficients; Hydrogen electrode; Silver–silver chloride electrode; Vapor pressure; Critical evaluation; Debye–Hückel equation; Pitzer equation;
D O I
暂无
中图分类号
学科分类号
摘要
The simple three-parameter Pitzer and extended Hückel equations were used for calculation of activity coefficients of aqueous hydrochloric acid at various temperatures from 0 to 50 °C up to a molality of 5.0 mol·kg−1. A more complex Hückel equation was also used at these temperatures up to a HCl molality of 16 mol·kg−1. The literature data measured by Harned and Ehlers J. Am. Chem. Soc. 54, 1350–1357 (1932) and 55, 2179–2193 (1933) and by Åkerlöf and Teare [J. Am. Chem. Soc. 59, 1855–1868 (1937)] on galvanic cells without a liquid junction were used in the parameter estimations for these equations. The latter data consist of sets of measurements in the temperature range 0 to 50 °C at intervals of 10 °C, and data at these temperatures were used in all of these estimations. It was observed that the estimated parameters follow very simple equations with respect to temperature. They are either constant or depend linearly on the temperature. The values for the activity coefficient parameters calculated by using these simple equations are recommended here. The suggested new parameter values were tested with all reliable cell potential and vapor pressure data available in literature for concentrated HCl solutions. New Harned cell data at 5, 15, 25, 35, and 45 °C up to a molality of 6.5 mol·kg−1 are reported and were also used in the tests. The activity coefficients obtained from the new equations were compared to those calculated by using the Pitzer equations of Holmes et al. [J. Chem. Thermodyn. 19, 863–890 (1987)] and of Saluja et al. [Can. J. Chem. 64, 1328–1335 (1986)] at various temperatures, and by using the extended Hückel equation of Hamer and Wu [J. Phys. Chem. Ref. Data 1, 1047–1099 (1972)] at 25 °C.
引用
收藏
页码:39 / 59
页数:20
相关论文
共 51 条
[1]  
Hamer W.J.(1972)Osmotic coefficients and mean activity coefficients of uni-univalent electrolytes at 25°C J. Phys. Chem. Ref. Data 1 1047-1099
[2]  
Wu Y.C.(1936)The determination of activity coefficients from potentials of concentration cells with transference. II. Hydrochloric acid at 25 J. Am. Chem. Soc. 58 1970-1972
[3]  
Shedlovsky T.(1919)The vapor pressures and free energies of the hydrogen halides in aqueous solutions; the free energy of formation of hydrogen chloride J. Am. Chem. Soc. 41 1991-2001
[4]  
MacInnes D.A.(1963)Experimentelle Untersuchungen über das thermodynamische Verhalten konzentrierter Halogenwasserstoffsäuren Z. Phys. Chem. (Neue Folge) 37 210-229
[5]  
Bates S.J.(1924)The activity coefficient of dilute aqueous solutions of hydrogen chloride, thallous chloride and lead nitrate J. Am. Chem. Soc. 46 2418-2437
[6]  
Kirschman H.D.(1989)Mean activity coefficients of several uni-univalent electrolytes in dilute aqueous solutions at 298.15 K Acta Polytech. Scand., Chem. Technol. Metall. Ser. 188 1-89
[7]  
Haase R.(1973)Thermodynamics of electrolytes. II. Activity and osmotic coefficients for strong electrolytes with one or both ions univalent J. Phys. Chem. 77 2300-2308
[8]  
Naas H.(1986)High-temperature thermodynamic properties of several 1:1 electrolytes Can. J. Chem. 64 1328-1335
[9]  
Thumm H.(1987)The enthalpy of dilution of HCl(aq) to 648K and 40MPa. Thermodynamic properties J. Chem. Thermodyn. 19 863-890
[10]  
Randall M.(1990)Modeling of the thermodynamics of electrolyte solutions to high temperatures including ion association. Application to hydrochloric acid J. Phys. Chem. 94 7675-7681