Question

3.4 In most cases, the currents for individual processes are additive, that is, the total current, i, is given . Consider a solution with a as the sum of the currents for different electrode reactions (i, i2, i3, Pt working electrode immersed in a solution of 1.0 M HBr and 1 mM K,Fe(CNs. Ass lowing exchange current densities: Assume the fol- H+/H2 Br2/Br Fe(CN)67/Fe(CN)4- jo 103 A/cm2 Jo = 10-2 A/cm2 Jo=4×10-5 A/cm2 3.8 Problems 135 Use a spreadsheet program to calculate and plot the current-potential curve for this system scanning from the anodic background limit to the cathodic background limit. Take the appro- priate standard potentials from Table C.1 and values for other parameters (mo, a, .. . ) from Problem 3.3. The general equation referred in problem 3.2 is following: asS 1ー , expl-afn] 1 lo exp[(1-α)/n] ,a sion

Answer 1

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