17-38. Peak current (Ip) and scan rate (v) are listed for cyclic voltammetry of the reversible reaction Fe(II) → Fe(III) of a water- soluble ferrocene derivative in 0.1 M NaCl. 59 N(CH3) Scan rate (V/s) 0.019 2 Fe PF 0.048 9 0.075 1 0.125 0.175 0.251 Peak anodic current (A) 2.18 3.46 4.17 5.66 6.54 7.55 If a graph of I, versus Vv gives a straight line, then the reaction is diffusion controlled. Prepare such a graph and use it to find the dif- fusion coefficient of the reactant from Equation 17-21 for this one- electron oxidation. The area of the working electrode is 0.020 1 cm², and the concentration of reactant is 1.00 mM.