Question

Use the following redox couples to answer the following questions. Hint: you might find it helpful to create an electron tower of the redox couples first.

Redox Couples (potential in volts)

Fe3+/Fe2+ = +0.771 V; CoQ/CoQH2 = +0.10V; NO2-/NH4+ = +0.44 V; CO2/glucose = -0.43 V;

FAD/FADH2 = -0.18V; NAD+/NADH = -0.32 V; NO3-/NO2- = +0.421 V; O2/H2O = +0.815 V; pyruvate/lactate = -0.19 V; S0/H2S = -0.27 V; NO3-/N2 = +0.74; SO42-/S0 = -0.20.

1. If members of the redox couples provided were used to set up the most energetically favorable chemical reaction, the initial electron donor should be _____________________________________ and the final electron acceptor should be __________________________________________. What would be the products formed? _________________________________________. What would be the ΔE’0? _____________________________________________.

Answer 1