5. Answer AlL pars: (a) Show how a charge - time plot caa be related to the rate of an electrochemicol reaction. Include units in your answer. (b) A company used lisear sweep stripping voltamasetry to develop and optimice a thin gold layer deposition process to plate a micro component in a memory storage device. Au3u+3erAu0Ip=2.7RTn2F2ACmLv The stripping peak current (Ip) was measured as a function of the scaa rate (v) and the resultant plot retumed a slope value of 7.866104AsV1. Calculate the thickness, L. of the deposited gold layer at a 2mm diameter electrode from a 2mM gold ion solution, at 25C, Show all steps and unit cancellations in your answer. [10 marks] (c) Rotating disk electrode voltammetry was performed to study the oxidation of dopamine at a modified electrode to derive limiting current values. The following oxidation limiting currents, for a 0.5mM dopamine solution, were obtained as a. function of the modified electrode rotation speeds. Dopamine Dopamine-0-quinone +2e+2H+ tISr1=nFACkMLF1+nFAv1/6D2/3C1/21.61 (i) Use the Koutecky-Levich equation to create an appropriate plot of the data. [15 marks] (ii) Use the graph to determine the polymer surface coverage, , if the heterogeneous electron transfer rate constant, kse=328.56dm3mol151 and the electrode diameter =3mm. Sbow how units cancel in all steps of your calculation