Modification of the Pitzer model to calculate the mean activity coefficients of electrolytes in a water-alcohol mixed solvent solution

1994 ◽  
Vol 23 (12) ◽  
pp. 1301-1315 ◽  
Author(s):  
S. Ye ◽  
P. Xans ◽  
B. Lagourette
Keyword(s):  
Activity Coefficients ◽  
Mixed Solvent ◽  
Pitzer Model ◽  
The Mean ◽  
Mean Activity Coefficients ◽  
Water Alcohol

Osmotic and activity coefficients of some simple borates in aqueous solution at 25°

1969 ◽  
Vol 47 (12) ◽  
pp. 2271-2273 ◽  
Author(s):  
R. F. Platford
Keyword(s):  
Boric Acid ◽  
Activity Coefficients ◽  
Solubility Limit ◽  
Sodium Tetraborate ◽  
Sodium Metaborate ◽  
Partial Association ◽  
The Mean ◽  
Vapor Pressure Measurements ◽  
Mean Activity Coefficients ◽  
Osmotic Behavior

Activity coefficients for sodium tetraborate, potassium tetraborate, sodium metaborate, sodium fluoroborate, and orthoboric acid were derived from isopiestic vapor pressure measurements. The osmotic behavior of sodium tetraborate, at concentrations up to its solubility limit, was the same as that of the more soluble potassium salt. The mean activity coefficients of both tetraborates were quite low: 0.355 at 0.1 m; the activity coefficients of sodium metaborate and fluoroborate were less than those of sodium chloride, indicating partial association in solution.The boric acid results were not very reliable because boric acid apparently volatilized during the measurements, but the results obtained indicated that it behaves like a non-electrolyte at all concentrations up to saturation, with an activity coefficient never less than 0.92.

Activity coefficients and standard Gibbs free energies of transfer of NaCl and KCl from water to aqueous solution of 2-butoxyethanol by EMF studies

1993 ◽  
Vol 71 (12) ◽  
pp. 2038-2042 ◽  
Author(s):  
Yvonne MacPherson ◽  
R. Palepu
Keyword(s):  
Activity Coefficients ◽  
Empirical Equation ◽  
Glass Electrode ◽  
Free Energies ◽  
Selective Electrode ◽  
Cell Potential ◽  
Emf Measurements ◽  
Free Energies Of Transfer ◽  
The Mean ◽  
Mean Activity Coefficients

From the emf measurements of the cell Na- or K-glass electrode|2-butoxyethanol, H2O, NaCl or KCl|Cl ion-selective electrode, the standard potentials were determined at 298 K for five different compositions of the solvent. From the emf data the mean activity coefficients of NaCl and KCl were calculated and fitted to an empirical equation. The standard Gibbs free energies of transfer of NaCl and KCl from water to mixtures of water and 2-butoxyethanol were calculated from the cell potential.

APPLICATION OF ION-SELECTIVE ELECTRODES FOR DETERMINING THE MEAN ACTIVITY COEFFICIENTS OF ELECTROLYTES (EXEMPLIFIED BY THE NaCl + Na2SO4+ H2O SYSTEM)

1989 ◽  
pp. 595-609
Author(s):  
P.YA. TISHCHENKO ◽  
A.S. BYCHKOV ◽  
A. HRABÉCZY-PÁLL ◽  
K. TÓTH ◽  
E. PUNGOR
Keyword(s):  
Activity Coefficients ◽  
Ion Selective Electrodes ◽  
The Mean ◽  
Mean Activity Coefficients

Solubility in the System (NH4)2S2O8—NH3—H2O and Mean Activity Coefficients of Saturated Solutions of (NH4)2S2O8

2012 ◽  
Vol 5 (1) ◽  
pp. 12-14
Author(s):  
Jan Balej
Keyword(s):  
Activity Coefficient ◽  
Activity Coefficients ◽  
Pure Water ◽  
Relative Activity ◽  
Mean Activity Coefficient ◽  
The Mean ◽  
Water Values ◽  
Mean Activity Coefficients ◽  
Ammonium Peroxodisulfate ◽  
Saturated Solutions

Solubility in the System (NH4)2S2O8—NH3—H2O and Mean Activity Coefficients of Saturated Solutions of (NH4)2S2O8The solubility data of ammonium peroxodisulfate in aqueous ammonia solutions at 15.5 °C have been evaluated using the relative activity coefficient expansion. Using the known value of the mean activity coefficient of saturated solution of ammonium peroxodisulfate in pure water, values of the mean activity coefficients of this salt in the saturated solutions of the given system have been calculated.

Activity Coefficients of Tris(ethylenediamine)cobalt(III) Hexacyanoferrate(III) in Water and Mixed Water-Alcohol Solvents

1993 ◽  
Vol 58 (8) ◽  
pp. 1791-1797 ◽  
Author(s):  
Vladislav Holba
Keyword(s):  
Aqueous Solution ◽  
Activity Coefficients ◽  
Transfer Functions ◽  
Butyl Alcohol ◽  
Alcohol Solvents ◽  
Mixed Water ◽  
Mean Activity Coefficients ◽  
Water Alcohol

The solubility of tris(ethylenediamine)cobalt(III) hexacyanoferrate(III) were measured in aqueous solution of NaClO4, NaCl, KCl, KBr, K2SO4, Mg2SO4, (CH3)4NBr, (C2H5)4NBr, (1-C3H7)4NBr, and (1-C4H9)4NBr, as well as in the solution of NaClO4 in mixtures of water with methanol and tert-butyl alcohol. The experimental mean activity coefficients are compared with theoretical ones evaluated with the aid of extended Debye-Huckel relation. From the solubilities in water and in water-alcoholic solvents the thermodynamic transfer functions of the saturating salt were calculated.

scholarly journals Determination of the Mean Activity Coefficients of Mixed Aqueous Sulfuric Acid-Sulfate Solutions

1984 ◽  
Vol 52 (10) ◽  
pp. 659-665 ◽  
Author(s):  
Yasuhiro AWAKURA ◽  
Kaname MATSUMOTO ◽  
Hiroshi MAJIMA
Keyword(s):  
Sulfuric Acid ◽  
Activity Coefficients ◽  
Acid Sulfate ◽  
Aqueous Sulfuric Acid ◽  
Sulfate Solutions ◽  
The Mean ◽  
Mean Activity Coefficients

The mean activity coefficients of LaCl3 in dilute aqueous solution at 298.15K

2010 ◽  
Vol 289 (1) ◽  
pp. 49-53 ◽  
Author(s):  
Zheng Fang ◽  
Yangguo Chen ◽  
Guanzhou Qiu
Keyword(s):  
Aqueous Solution ◽  
Activity Coefficients ◽  
Dilute Aqueous Solution ◽  
The Mean ◽  
Mean Activity Coefficients
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