Results of Pilot Comparisons of National Standards for the Activity of Hydrogen Ions in Aqueous Solutions

2021 ◽  
Author(s):  
S. V. Prokunin ◽  
A. N. Shchipunov ◽  
D. A. Vengina ◽  
F. Bastkowskiy ◽  
E. Uysal ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
National Standards ◽  
Hydrogen Ions

Yields and reactions of hydrogen ions on radiolysis of water and aqueous solutions

1977 ◽  
Vol 63 ◽  
pp. 112 ◽  
Author(s):  
Alexei K. Pikaev ◽  
Sergei A. Kabakchi ◽  
Alla A. Zansokhova
Keyword(s):  
Aqueous Solutions ◽  
Hydrogen Ions

Degradation and crosslinking of dextran in aqueous solutions by γ-radiolysis: The effect of hydrogen ions

2000 ◽  
Vol 34 (2) ◽  
pp. 74-79 ◽  
Author(s):  
G. V. Kovalev ◽  
A. P. Sinitsyn ◽  
L. T. Bugaenko
Keyword(s):  
Aqueous Solutions ◽  
Hydrogen Ions

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 Synergetic Effect of Hydrogen Ions on the Cation Exchange of Potassium in Micas

Clay Minerals ◽  
1970 ◽  
Vol 8 (4) ◽  
pp. 361-373 ◽  
Author(s):  
A. C. D. Newman
Keyword(s):  
Chemical Composition ◽  
Aqueous Solutions ◽  
Cation Exchange ◽  
Negative Charge ◽  
Synergetic Effect ◽  
Hydrogen Ions ◽  
Chemical Changes ◽  
Ph Values

AbstractInterlayer K in eleven trioctahedral micas, with compositions ranging from fluorphlogopite to biotite, was replaced by treating cut flakes with aqueous solutions of Na salts at controlled pH values. Replacement in natural micas was faster at pH 4·5 than at pH 9, and there is a co-operative action or synergy of H+ and Na+ in replacing K+. The synergetic effect of H+ tends to be greatest in micas that lose most net negative charge when K is replaced, and increases when Fe2+ in biotite is oxidized by heating. Possible relationships between the synergetic effect and the chemical composition of micas are discussed in relation to the structure and chemical changes in the aluminosilicate layers when K is exchanged, and it is concluded that incorporation of protons into the structure is responsible for the synergetic effect.

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