Unit 1
Background Theory: Origin of potential – electrical double layer – reversible electrode potential – standard hydrogen electrode – emf series – measurement of potential – reference electrodes (calomel and silver/silver chloride) indicator and ion selective electrodes – Nernst equation – irreversible processes – kinetic treatment – ButlerVolmer equation – Overpotential, activation, concentration and IR overpotential – its practical significance – Tafel equation and Tafel plots – exchange current density and transfer coefficients.