STUDIES ON THE CATAPHORETIC SPEED OF SOL PARTICLES AS DEPENDENT ON THE REDOX POTENTIAL OF THE LIQUID MEDIUM

Mobility of colloidal particles of platinum and gold in very dilute aqueous solutions of a few redox systems have been studied. Results indicate that the change in the cata­phoretic speed and hence the electrokinetic  potential of the gold and platinum particles are not probably due to any specific ion adsorption but are due to more general factors the predominant one being the electron activity of the medium which is responsible for the oxidation-reduction potential of the system.