Abstract
The properties of platinum and glassy carbon indicator electrodes in acid-base titrations have been studied and the results obtained compared with those of earlier papers. The polarization curves of the titration systems show that the equilibrium potentials of the indicator electrodes during the course of the titration are given by the irreversible redox system consisting of cathodic reduction of dissolved air-oxygen and anodic oxidation of water which is dependent upon the pH of the solution. The effect of various substances on the course of the titration curves and thereproducibility and precision of these titrations have been studied.
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