Prediction of Osmotic and Activity Coefficients Using a Modified Pitzer Equation for Multicomponent Strong Electrolyte Systems at 298 K

2003 ◽  
Vol 42 (5) ◽  
pp. 1087-1092 ◽  
Author(s):  
Fernando Pérez-Villaseñor ◽  
Gustavo A. Iglesias-Silva ◽  
Kenneth R. Hall
Keyword(s):  
Activity Coefficients ◽  
Strong Electrolyte ◽  
Pitzer Equation

Osmotic and Activity Coefficients Using a Modified Pitzer Equation for Strong Electrolytes 1:1 and 1:2 at 298.15 K

2002 ◽  
Vol 41 (5) ◽  
pp. 1031-1037 ◽  
Author(s):  
Fernando Pérez-Villaseñor ◽  
Gustavo A. Iglesias-Silva ◽  
Kenneth R. Hall
Keyword(s):  
Activity Coefficients ◽  
Pitzer Equation ◽  
Strong Electrolytes

Osmotic coefficients and activity coefficients of aqueous mixtures of sodium chloride and sodium carbonate at 25°C

1980 ◽  
Vol 33 (9) ◽  
pp. 1903 ◽  
Author(s):  
Jr DR White ◽  
RG Bates
Keyword(s):  
Sodium Chloride ◽  
Activity Coefficients ◽  
Sodium Carbonate ◽  
Osmotic Coefficients ◽  
Pitzer Equation ◽  
Aqueous Mixtures ◽  
Free Energies ◽  
Scatchard Equation ◽  
The Individual ◽  
Reference Electrolyte

Isopiestic vapour-pressure measurements have been used to determine the osmotic coefficients of aqueous mixtures of sodium chloride and sodium carbonate at 25°C. Solutions of sodium chloride were used as the reference electrolyte. The data served to evaluate the excess free energies of mixing as well as the mixing parameters of the Scatchard and Pitzer theories. The three-parameter form of the Scatchard equation accounts well for the experimental results, and the Pitzer equation with two adjustable parameters does equally well. The activity coefficients of the individual salts in the mixtures have been calculated.

Activity Coefficients and Gibbs Energies of Transfer of Tetraalkylammonium Dianilinetetraisothiocyanatochromates(III)

1994 ◽  
Vol 59 (8) ◽  
pp. 1738-1744
Author(s):  
Vladislav Holba
Keyword(s):  
Activity Coefficients ◽  
Transfer Functions ◽  
Butyl Alcohol ◽  
Methyl Ethyl ◽  
Tetraalkylammonium Ions ◽  
Ionic Transfer ◽  
Gibbs Energies ◽  
Gibbs Energies Of Transfer ◽  
Acetonitrile Solutions ◽  
Mixed Systems

The solubilities of tetraalkylammonium dianilinetetraisothiocyanatochromates(III) (alkyl = methyl, ethyl, 1-propyl, and 1-butyl) in water, water - methanol, water - tert-butyl alcohol and water - acetonitrile solutions were measured at 25 °C. The results were used to evaluate the activity coefficients and Gibbs energies of transfer of the saturating salts from water to the mixed systems. The Gibbs energies of transfer of the [Cr(C6H5NH2)2(NCS)4]- ion were obtained by means of known ionic transfer functions for the tetraalkylammonium ions based on the TATB assumption.

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