Esam A. Gomaa - hemistry Department, Faculty of Science, Mansoura University, ۳۵۵۱۶-Mansoura, Egypt
Moustafa A. Diab - Chemistry Department, Faculty of Science, Damitta University, Damitta, Egypt
Adel Z. El Sonbati - Chemistry Department, Faculty of Science, Damitta University, Damitta, Egypt
Hamed M. Abuo Elnader - Chemistry Department, Faculty of Science, Mansoura University, ۳۵۵۱۶-Mansoura, Egypt
Gannat S. Abd Elraoof - Chemistry Department, Faculty of Science, Damitta University, Damitta, Egypt

Redox reaction mechanism in absence and presence of Valporic Acid (VaA) was Studied in cyclic voltammetry, we used a new silver electrode made from pure Silver piece jointed to Copper wire and isolated by heat shrink polymer to insure Complete isolation, during measurments. The Silver electrode was polished with Al۲O۳ in woolen piece, washed and used for the cyclic voltammetric Study. The stability constants and Gibbs free energies of Complex reactions between HgCl۲ and Valproic acid (VaA) in ۰.۰۱ M KNO۳ at ۲۲˚C were evaluated and their results were discussed.

Cyclic Voltammetry, Thermodynamic parameter, Copper bromide, Solvation parameters, Stability Constants