Using Cyclic Voltammetry, Potassium Ferricyanide Interaction with Crystal Violet in HNO3 Medium

Document Type : Original Article

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Department of Chemistry, Mansoura University, Faculty of Science, Mansoura, Egypt.

Abstract

The cyclic voltammetry technique was used to study the electrochemical behavior of potassium ferricyanide and its interaction with crystal violet dye. The resulting voltammogram was analyzed for information about the redox reactions. The number of electrons involved in the redox reaction for a reversible process is related to the difference in peak potential by 59 mv/n (n is the number of electrons). The ratio of anodic peak current (ipa) and cathodic peak current (ipc) for different concentrations of K3Fe (CN) 6 was unity, indicating a reversible redox reaction. The mean peak potential difference (ΔEp) for different potassium ferricyanide concentrations and also at different scan rates is very small, supporting the reversibility of the waves. The effects of different ligand crystal violet concentrations were studied on the potassium ferricyanide cyclic voltammogram with an increase in most solvation parameters. The stability constants and Gibbs free energies of the interaction between potassium ferricyanide and crystal violet were evaluated and support the complexation reaction

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