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Potentiometric titrations of some azo dyes containing a hydroxy group with tetrabutylammonium hydroxide in acetonitrile

Selahattın Serın, Mükerrem Kurtoğlu

Abstract

Fifteen azo dyes containing a hydroxy group, phenol, 1-naphthol and 2-naphthol were titrated potentiometrically with tetrabutylammonium hydroxide (TBAH) at room temperature. Potentiometric titration curves of these compounds in acetonitrile with TBAH propan-2-ol–methanol are similar to those of weak acids obtained in aqueous media with strong bases. Acetonitrile is a suitable medium for the weakly acidic compounds titrated in this work.

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Key concepts: Tetrabutylammonium hydroxide, Potentiometric titration, Acetonitrile, Chemistry, Titration, Hydroxide, Methanol, Phenol