Dissociation constants of phosphoric acid in dimethylformamide-water mixtures at 298.15 K

• Published in: Russian Journal of Physical Chemistry A Vol. 83; no. 10; pp. 1747 - 1750
• Main Authors: Safonova, L. P., Fadeeva, Yu. A., Pryakhin, A. A.
• Format: Journal Article
• Language: English
• Published: Moscow Nauka/Interperiodica 01-10-2009
• Subjects: Chemistry; Chemistry and Materials Science; Physical Chemistry; Physical Chemistry of Solutions; Tetraethylammonium Bromide; DMFA; Thermodynamic Dissociation Constant; Dissociation Constant; Sodium Salicylate
• ISSN: 0036-0244; 1531-863X
• DOI: 10.1134/S0036024409100215

The dissociation constants of phosphoric acid (p
K
1
and p
K
2
) in water-dimethylformamide (DMFA) mixtures (0–0.65 mole fractions of DMFA) were determined at 298.15 K by potentiometric titration. The extrapolation of these data to pure DMFA and the comparative calculation method were used to estimate the dissociation constants of the acid in DMFA.