Spectrophotometric and Conductometric Study of Methyl Orange - Cetylpyridinium Chloride Ion Pair in Aqueous Solution
Khaled Edbey *
Department of Chemistry, Faculty of Science, University of Benghazi, Libya
K. El Ttaib
Department of Chemistry, Faculty of Science, University of Benghazi, Libya
A. Benhmid
Department of Chemistry, Faculty of Science, University of Benghazi, Libya
Fateh Eltaboni
Department of Chemistry, Faculty of Science, University of Benghazi, Libya
Abdelqader Imragaa
Department of Chemistry, Faculty of Science, University of Benghazi, Libya
Anas Alferjany
Department of Chemistry, Faculty of Science, University of Benghazi, Libya
*Author to whom correspondence should be addressed.
Abstract
Binding constant (Kb) was calculated by means of Benesi-Hildebrand equation. Gibbs free energy (∆G°) was calculated at room temperature. The binding constant and the Gibbs free energy results showed that the interaction between the oppositely charged dye and surfactant is very strong.
Keywords: Cetylpyridinium chloride, CMC determination, methyl orange, dye-micelle interaction, binding constant, Gibbs free energy, conductometry, spectrophotometry