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
Acid—base titrations in aqueous micellar systems
✍ Scribed by A.L. Underwood
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 481 KB
- Volume
- 93
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
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 solutions, but visual titrations are convenient. Observed ph-shifts are generally interpretable in terms of the influence of micellar charge on the work of proton removal.
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