Electrokinetic Study of Gallium(III) with DL α-Alanine in Aqueous and 25% Ethanol in Water (v/v) at D.M.E.

Abstract

The polarographic behaviour of gallium(III) in DL α-alanine in aqueous and 25% ethanol-water (v/v) media has been studied. The reduction of Ga(III) (1 mM) has been found to be irreversible and diffusion controlled in the presence of 0.1 M KCl and 0.0002% triton-X-100. The values of kinetic parameters, transfer coefficient (α_n) and formal rate constant (k⁰_f,h) of the electrode reactions have been calculated by Koutecky’s method. The values of thermodynamic parameters, the free energy of activation (ΔG^≠), the enthalpy of activation (ΔH^≠) and the entropy of activation (ΔS^≠) have also been determined at 30°C.