Given the standard reduction potentials (Eo ’) for ubiquinone (Q) Q + 2H+ + 2e- ---> QH2 E o ’ = 0.04V FMN + 2H+ + 2e- ---> FMNH2 E o ’ = -0.22V Calculate the standard ΔEo ’ for the oxidation of FMNH2 by Q. Make sure to show each half reaction and the overall redox reaction. From the reactants in your derived redox reaction, indicate the oxidant and reductant

Standard Reduction Potentials at 25 °C Eº(volts) -2.700 -2.100 -2.300 Half-reaction Nd3++eNd²+ Nd²+ + 2e Nd³+ + 3e. Submit Answer Nd +Nd In a disproportionation reaction, the same species is oxidized and reduced. Use the data given above to analyze the disproportionation reaction: 3Nd2+ Nd + 2Nd³+ Will Nd2+ disproportionate in aqueous solution? To justify your answer, what is the standard cell voltage for the disproportionation reaction? Retry Entire Group 7 more group attempts remaining V

Part A Standard reduction potentials of interest in biochemistry Oxidant Pyruvate + CO₂ + H+ + 2e¯ NAD+ + H+ + 2e¯ Acetaldehyde + 2H+ + 2e¯ Pyruvate + 2H+ + 2e¯ Oxaloacetate + 2H+ + 2e¯ = = = Reductant n EO! (V) 2 -0.33 2 -0.32 2 -0.20 2 -0.19 2 -0.17 Malate NADH Ethanol Lactate Malate Referring to the table for E' values, calculate AG' for oxidation of lactate by lactate dehydrogenase. Express your answer to two significant figures and include the appropriate units.

e) Using the half reaction below sHE Pou3- HPO,2 + 2H* + 2e HPO+H;O E--0,234 V and acid dissociation constants for H3PO4 (K=7.11 × 10°; K2 = 6.32 × 10*, K7.1 x 1014), calculate standard reduction potential for the half reaction he Oy H2POª + H* + 2e HPO + H;O