Liquidus temperatures of some systems salt-dimethyl sulphoxide and solvate formation. Preferential solvation by dimethyl sulphoxide

1985 ◽  
Vol 50 (7) ◽  
pp. 1457-1464 ◽  
Author(s):  
Petr Pacák ◽  
Ivo Sláma
Keyword(s):  
Mixed Solvent ◽  
Preferential Solvation ◽  
Dimethyl Sulphoxide ◽  
Concentrated Solutions ◽  
Solvent Water ◽  
Spectroscopic Analyses ◽  
Infrared Spectroscopic ◽  
Liquidus Temperatures

Liquidus temperatures were measured for concentrated solutions of LiCl, CaCl2, ZnCl2, Zn(NO3)2, NaNO3 and Mg(NO3)2 in dimethyl sulphoxide. Crystalline solvates of salts with dimethyl sulphoxide which separated from these solutions were isolated and subjected to chemical and infrared spectroscopic analyses. It has been proved that in concentrated solutions in the mixed solvent water-dimethyl sulphoxide, the salts are preferentially solvated by dimethyl sulphoxide.

Viscosity, electrical conductivity and density of the system ammonium nitrate-dimethyl sulphoxide

1984 ◽  
Vol 49 (5) ◽  
pp. 1109-1115
Author(s):  
Jindřich Novák ◽  
Zdeněk Kodejš ◽  
Ivo Sláma
Keyword(s):  
Electrical Conductivity ◽  
Aqueous Solutions ◽  
Ammonium Nitrate ◽  
Transport Properties ◽  
Calcium Nitrate ◽  
Dimethyl Sulphoxide ◽  
Present System ◽  
Empirical Equations ◽  
Concentrated Solutions ◽  
Nitrate Solutions

The density, viscosity, and electrical conductivity of highly concentrated solutions of ammonium nitrate in dimethyl sulphoxide have been determined over the temperature range 10-60 °C and the concentration range 7-50 mol% of the salt. The variations in the quantities as a function of temperature and concentration have been correlated by empirical equations. A comparison is made between the transport properties for the present system, aqueous solutions of ammonium nitrate, and calcium nitrate solutions in dimethyl sulphoxide.

Solubility of Sodium Sulfate in a Mixed Solvent Water-Methyldiethanolamine at 25 and 35°C

2005 ◽  
Vol 78 (3) ◽  
pp. 386-389
Author(s):  
Yu. A. Anufrikov ◽  
N. D. Fedicheva ◽  
G. L. Kuranov
Keyword(s):  
Sodium Sulfate ◽  
Mixed Solvent ◽  
Solvent Water

POLYCONDENSED ANIONS OF THE TRANSITION METALS: LIGHT SCATTERING AND ULTRACENTRIFUGATION WITH SCHLIEREN AND INTERFERENCE OPTICS OF ALKALINE NIOBIUM (V) SOLUTIONS

1964 ◽  
Vol 42 (4) ◽  
pp. 731-743 ◽  
Author(s):  
Wilfred H. Nelson ◽  
R. Stuart Tobias
Keyword(s):  
Light Scattering ◽  
Experimental Methods ◽  
Degree Of Polymerization ◽  
Potassium Ions ◽  
High Symmetry ◽  
Concentrated Solutions ◽  
Solvent Water ◽  
A Value ◽  
The Stability ◽  
Equilibrium Ultracentrifugation

Alkaline aqueous niobium(V) solutions prepared by dissolving the salt K14Nb12O37•27H2O were studied by means of light scattering and by equilibrium ultracentrifugation by using both schlieren and interference optics. All three experimental methods indicate that the degree of polymerization of the polycondensed niobate anion is no less than 5 and probably has the value 6. The centrifugation data indicate that only one polycondensed species exists in the solutions. The effective charge of the niobate anion appears to be reduced appreciably by the binding of potassium ions to a value of no greater than −2. The behavior of the solutions is very similar to that observed previously with alkaline tantalum(V) solutions, and it appears very likely that the hexameric anion [HNb6O19]−7 found in niobate crystals also exists in aqueous solutions. The niobate is slightly protonated in comparison to the analogous tantalate. The stability of highly concentrated solutions containing this large polycondensed species is probably the result of the existence of a poly-ion with high symmetry which interacts only weakly with the solvent, water.

NF in organic solvent/water mixtures: Role of preferential solvation

2013 ◽  
Vol 444 ◽  
pp. 101-115 ◽  
Author(s):  
Patrizia Marchetti ◽  
Alessandro Butté ◽  
Andrew G. Livingston
Keyword(s):  
Organic Solvent ◽  
Preferential Solvation ◽  
Solvent Water
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