Answer Happy

-1 0 /XH3 and Y / YH2 1. Imagine two redox pairs: XO2 -1 Eo'= -0.35 V for the redox pair XO2 / XH3 YO/YH2 Eo' = + 0.5 V for the redox pair Predict which molecule will be the energy source and which molecule will be the electron acceptor in an energy generating process. Write out the overall equation.

2. For each redox pair given below, decide which compound is the energy source, which is the electron acceptor and what the waste products are. The Redox Tower Eo (V) -0.60 -1 -1 a) CO₂/glucose and NO3-¹/NO₂-¹ SO4²-/HSO3(-0.52) 2 e- -0.50 -2 CO₂/glucose (-0.43) 24 e 2 H¹/H₂ (-0.42) 2 e- CO₂/methanol (-0.38) 6 e - -0.40 b) SO3 H₂S and 1/2 0₂/H₂O - -0.30 + NAD+/NADH (-0.32) 2 e CO₂/acetate (-0.28) 8 e- sº/H₂S (-0.28) 2 e CO₂/CH4 (-0.24) 8 e FAD/FADH (-0.22) 2 e Pyruvate/lactate (-0.19) 2 e SO3²/H₂S (-0.17) 6 e -0.20 c) 1/2 02/H₂0 and 2H /H2 -0.10 d) Fe+3/Fe+2 and CO₂/acetate/P Fumarate/succinate (+0.03) 2 e Cytochrome box/red (+0.035) 1 e- e) CO2/glucose and pyruvate/lactate Ubiquinone ox/red (+0.11) 2 e Fe³+/Fe2+ (+0.2) 1e", (pH 7) Cytochrome Cox/red (+0.25) 1 e Cytochrome aox/red (+0.39) 1 e NO3 /NO₂ (+0.42) 2 e- (3) NO3-N₂ (+0.74) 5 e Fe³+/Fe2+ (+0.76) 1 e", (pH 2) 0₂/H₂0 (+0.82) 2 e | (1) H₂ + fumarate → succinate (2) H₂ + NO3 (3) H₂ + ¹/ 0₂ (2) (1) -0.0 +0.10 +0.20 +0.30 +0.40 +0.50 +0.60 +0.70 +0.80 +0.90 AG-86 kJ = -163 kJ = -237 kJ NO₂ + H₂O AGO, H₂O AGO,