Some water-insoluble carborylic acids and amines have been titrated in aqueous surfactant solutions to demonstrate that solubilization in micelles provides a useful solvent system for certain acid-base titrations. Potentiometric titrations can be very slow because of electrode drift in these solutio
Resolution of acid strength in non-aqueous acid-base titrations
✍ Scribed by A.Gustavo González; M.Angeles Herrador; Agustín G. Asuero
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 391 KB
- Volume
- 281
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
The equivalence between the resolution of the acid strength in a given solvent and the ratio (p*/p) of Hammett's reaction constants for the solvent and water was obtained on the basis of empirical linear free energy relationships (LFER). The resolution for benzoic acids in a number of solvents from reported data was calculated by regression techniques. Fair correlations between the resolution and some solvent parameters such as the Mayer-Gutman acceptor number and the normalized Diiroth polarity parameter were observed.
📜 SIMILAR VOLUMES
The dissociation equilibria of substituted benzoic acids in cationic and anionic micellar systems, investigated potentiometrically. show pK shifts of less than 1.0 in cationic and 0.5-3 in anionic micelles. Visual titrations of otherwise insoluble acids in cntionic micelles give satisfactory results
The acid-base equilibria of 2-furoic acid hydrazide (FAH) and adipic acid dihydrazide (AADH) were investigated by pH measurements in water-dimethylformamide (10:60, v/v) and water-dioxane (10:60, v/v). The protonation constants were estimated by MINIQUAD which employs a non-linear least squares meth