9. The kinetics of the oxidation of ferrodoxin by oxygen were investigated in a careful series of experiments, shown below at 25 C. 2 Fd[Fe2*] (aq) + O2 (aq) + 2 H* (aq) 2 Fd[Fe3*] + H:O2 (aq) What was measured was the absorbance of the Fd[Fe2+] at 475 nm after exactly 1 second of reaction, in a 1-cm cuvette. The initial absorbance of the solution at 475 nm was 0.095. Hint, from the decrease in A475 you can calculate how much Fd has reacted. [Fd[Fe2+]]o (uM) [02]o (mM) [H*]o (M) A475 after 1.0o sec 0.065 0.034 0.053 0.036 1.5 1.5 1.5 3. 1.5 0.050 3.0 1.5 1.5 0.050 0.050 0.100 a. Derive the RATE LAW. b. Given that the molar absorptivity coefficient of Fd[Fe2+] at 475 nm is 1750 , calculate the RATE CONSTANT with appropriate units. mol -