Studying Kinetics of the Dehydration Reaction of Pyruvic Acid and Ethyl Pyruvate Using the Polarographic Kinetic Currents

New analyses of the kinetics of the dehydration reaction of pyruvic acid and ethyl pyruvate gem-diol group have been performed using the direct current polarographic data. The diffusion contributions of the depolarizer (as keto-form) from the bulk solution to the total limiting kinetic and diffusion currents have been taken into account. As a result, corresponding equations for the kinetic current and for the thickness of the reaction layer have been obtained. It was shown that the condition of the stationarity of the diffusion and chemical reactions is carried out that is necessary for using the equation of the kinetic current. The values of the rate constants of the dehydration of the gem-diol group calculated by us were close to the ones found by other methods. Detailed analyses of the hydration equilibrium constants of the pyruvic acid keto-group allovved us to choose the most correct constants for kinetic calculations