The Diffusion Coefficients of Sodium and Potassium Iodides in Aqueous Solution at 25°1

1951 ◽  
Vol 73 (11) ◽  
pp. 5456-5457 ◽  
Author(s):  
P. J. Dunlop ◽  
R. H. Stokes
Keyword(s):  
Aqueous Solution ◽  
Diffusion Coefficients ◽  
Sodium And Potassium

Evaluation of changing the structure of aqueous solutions in the near-wall layers with using dielectrometry and resonance method

2015 ◽  
Vol 9 (2) ◽  
pp. 0-0
Author(s):  
Саркисов ◽  
Yu. Sarkisov ◽  
Сидоренко ◽  
G. Sidorenko ◽  
Лаптев ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Fluid Layer ◽  
Chloride Concentration ◽  
Resonance Method ◽  
Solution Concentration ◽  
Wall Layer ◽  
Oscillatory Circuit ◽  
Structure Of Aqueous Solutions ◽  
Sodium And Potassium

In this work the authors evaluated changes of the structure of aqueous solutions of chlorides of sodium and potassium in various concentrations in the parietal layer by means of the dielectrometry and resonance method. In experiments at 20 ° C, the concentration of sodium and potassium chloride concentration of 0.01 M to 1 M in thenear-wall layer "glass - water solutions" height of less than 1000 microns observed multiple reduction of capacitance of solutions, and Q of an oscillatory circuit and a multiple increase coefficient KS which allows to evaluate the structure of the solutions. It is shown that the structure of the solutions in the wall layer depends on the solution concentration, the nature of the solute and the material of surface. Methods of dielectrometry and resonance are informative in the interpretation of the processes in the fluid layer at the interface, "solid – aqueous solution".

Diffusion in aqueous solutions of sulfuric acid

1984 ◽  
Vol 62 (9) ◽  
pp. 1692-1697 ◽  
Author(s):  
Derek G. Leaist
Keyword(s):  
Aqueous Solution ◽  
Diffusion Coefficient ◽  
Sulfuric Acid ◽  
Aqueous Solutions ◽  
Diffusion Coefficients ◽  
Sharp Increase ◽  
Hydrogen Ions ◽  
Acid Component ◽  
Low Concentrations ◽  
Predicted Values

Diffusion of sulfuric acid in aqueous solution has been measured by a conductimetric technique at 25 °C over the concentration range from 0.00035 to 0.2 mol dm−3. At the lower end of this range, dissociation of bisulfate to sulfate and hydrogen ions produces a sharp increase in the rate of diffusion of the sulfuric acid component. Expressions are developed to predict the concentration dependence of the diffusion coefficient in terms of the mobilities of the diffusing ions and the degree of bisulfate dissociation. The treatment includes electrophoretic corrections that are derived from Onsager–Fuoss theory for the unsymmetrical, multi-ion electrolyte. At low concentrations where theory applies the observed diffusion coefficients are lower than the predicted values.

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