scholarly journals Diffusion Coefficients of Bolaform Electrolytes in Aqueous Solution

1973 ◽  
Vol 46 (2) ◽  
pp. 401-404 ◽  
Author(s):  
Hisashi Uedaira
Keyword(s):  
Aqueous Solution ◽  
Diffusion Coefficients ◽  
Bolaform Electrolytes

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.

The diffusion of monocarboxylic acids in aqueous solution at 25°

1965 ◽  
Vol 18 (3) ◽  
pp. 285 ◽  
Author(s):  
LA Dunn ◽  
RH Stokes
Keyword(s):  
Aqueous Solution ◽  
Acetic Acid ◽  
Propionic Acid ◽  
Butyric Acid ◽  
Diffusion Coefficients ◽  
Infinite Dilution ◽  
Association Constants ◽  
Activity Data ◽  
Interferometric Method ◽  
Monocarboxylic Acids

The diffusion of the monocarboxylic acids formic, propionic, and n-butyric in aqueous solution at 25� over the range 0.06-2.00M is studied by the Gouy interferometric method. The results, together with Vitagliano's and Lyons's results for acetic acid, are corrected to allow for the effects of ionization. A treatment of the effects of molecular association on the experimental diffusion coefficients is proposed, and applied with moderate success to acetic acid, propionic acid, and n-butyric acid. Mobilities of the undissociated acid molecules at infinite dilution are found to be greater than the limiting mobilities of the corresponding anions. Association constants of the monocarboxylic acids over the concentration range studied are calculated from existing activity data.

Sign in / Sign up

Export Citation Format

Share Document