Electrode of the first kind (cont'd) Electrode response given by Nernst equation(Nernstian) E=EO+(rT/nF)In a(M2t) NoTE Fe al and w electrodes are Not electrodes of the first Kind these have relatively thick surface oxide coatingsElectrode of the First Kind (cont’d) • Electrode response given by Nernst equation (Nernstian): – E = E0 + (RT/nF) ln a(M2+) • NOTE: Fe, Al, and W electrodes are NOT electrodes of the First Kind – these have relatively thick surface oxide coatings