Studies in ion solvation in non-aqueous solvents and their aqueous mixtures. Part 19.—Free energies of transfer of alkali metal chlorides from water to DMSO + water mixtures up to 40%(w/w) DMSO, of sodium chloride to 60%(w/w) DMSO and of potassium bromide and iodide to 10%(w/w) DMSO. Comparison with silver chloride

1979 ◽  
Vol 75 (0) ◽  
pp. 907 ◽  
Author(s):  
David Feakins ◽  
Brian E. Hickey ◽  
Philip J. Voice
Keyword(s):  
Sodium Chloride ◽  
Alkali Metal ◽  
Silver Chloride ◽  
Potassium Bromide ◽  
Ion Solvation ◽  
Aqueous Mixtures ◽  
Free Energies ◽  
Alkali Metal Chlorides ◽  
Metal Chlorides ◽  
Free Energies Of Transfer

Transfer free energies of alkali metal chlorides and of some individual ions in glycerol and water mixtures

1980 ◽  
Vol 58 (1) ◽  
pp. 79-85 ◽  
Author(s):  
Indra N. Basumullick ◽  
Kiron K. Kundu
Keyword(s):  
Alkali Metal ◽  
Aqueous Mixtures ◽  
Free Energies ◽  
Dispersion Interactions ◽  
Native Conformation ◽  
Alkali Metal Chlorides ◽  
Metal Chlorides ◽  
Emf Measurements ◽  
Reference Electrolyte ◽  
Electrolyte Ph

Staqndard free energies of transfer, ΔGt0, of alkali metal chlorides from water to aqueous mixtures of 10, 30, 50, and 70 wt.% glycerol have been determined from emf measurements of the double cell comprising Ag– AgCl and K(Hg) electrodes at 25°C. These values were divided into individual ion contributions by use of tetraphenyl arsonium tetraphenyl boride (Ph4AsBPh4) assumption, the required ΔGt0 values of the reference electrolyte (Ph4AsPh4B), obtained by measuring solubilities of KBPh4, Ph4AsPi, and KPi (Pi = picrate) in the solvents. The solvation behaviour of the involved ions, as dictated by their respective ΔGt0(i) values, in this as well as in systems of other similar co-solvents like ethanol, ethylene glycol, and urea, suggests that it is determined by one or several effects of acid-base, Born-type, and dispersion interactions. Moreover, comparable stability of PH4B–, particularly in aqueous glycerol and urea, suggests that "specific interactions" are possibly responsible for the well_known folding-unfolding phenomenon of native conformation of proteins in presence of co-solvents.

Gibbs free energies of transfer of the alkali-metal chlorides from water into t-butyl alcohol-water mixtures

1990 ◽  
Vol 158 (1) ◽  
pp. 107-114
Author(s):  
Mahmoud M. Elsemongy ◽  
Ahmed A. Abdel-Khalek
Keyword(s):  
Alkali Metal ◽  
Butyl Alcohol ◽  
Free Energies ◽  
Alkali Metal Chlorides ◽  
Metal Chlorides ◽  
Free Energies Of Transfer ◽  
Alcohol Water
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