Acid Dissociation Constants in Dioxane—Water Mixtures by Potentiometric Titration

1938 ◽  
Vol 60 (5) ◽  
pp. 1252-1259 ◽  
Author(s):  
Cecil C. Lynch ◽  
Victor K. La Mer
Keyword(s):  
Potentiometric Titration ◽  
Dissociation Constants ◽  
Acid Dissociation ◽  
Acid Dissociation Constants

Solution speciation in the aqueous Na(I)–EDTA and K(I)–EDTA systems

1993 ◽  
Vol 71 (5) ◽  
pp. 763-768 ◽  
Author(s):  
Min Chen ◽  
R. Stephen Reid
Keyword(s):  
Potentiometric Titration ◽  
Ethylenediaminetetraacetic Acid ◽  
Dissociation Constants ◽  
Equilibrium Constants ◽  
Acid Dissociation ◽  
Equilibrium Models ◽  
Acid Dissociation Constants ◽  
Aqueous Sodium ◽  
Ph Values ◽  
Solution Speciation

Speciation in the aqueous sodium(I) – ethylenediaminetetraacetic acid and potassium(I) – ethylenediaminetetraacetic acid equilibrium systems was investigated by automated gravimetric potentiometric titration. It was found that in both cases, particularly below neutral pH values, speciation includes a previously uncharacterized diprotonated complex. All formation and acid dissociation constants were measured for the full systems. The validity of previous literature equilibrium constants, which are based on incomplete equilibrium models, is discussed.

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