Abstract
Abstract The polarographic anodic current observed in the presence of selenate ion has been studied using a numerical method previously proposed by us. Though there is no current plateau in the current-potential curve, the current increases with an increase in the concentration of selenate. The logarithmic plots of the current against the electrode potential give a straight line with a slope of 39—40 mV/unit. With the aid of the numerical method, it is concluded that the anodic current is controlled by the rate of precipitation, and that the rate can be expressed by a formula which is derived by assuming a reaction sequence for precipitation and represents the rate controlled by the nucleation step.
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