Influence of external electric fields on reaction fronts in the iodate-arsenous acid system

The propagation of arsenous acid-iodate reaction fronts of different net st oichiometries in externally applied de electric fields is studied for a ran ge of both electric field intensities and initial compositions of the react ing mixture (represented by the stoichiometric factor S-0). Regions of thre e different types of net stoichiometry in the parametric space E/V vs S-0, where E is the intensity of the applied electric field and V the reaction f ront propagation Velocity, are determined both experimentally and by analyz ing a reaction-diffusion-migration model that includes a realistic kinetic scheme of the reaction studied. Both agreement with and discrepancies betwe en the theoretical predictions and experimental findings are discussed.