Electrons are transferred spontaneously from molecules with low electron affinit

Question

Electrons are transferred spontaneously from molecules with low electron affinity to molecules with high electron affinity. For the following pairs of reactions, determine which molecule will be oxidized and which one will be reduced. (Suggested: 2 points)
Reduction Potential
A. NAD+ + H+ + 2 e– -> NADH
cytochrome c (Fe3+) + e– -> cytochrome c (Fe2+) -0.41 V
+0.25 V
B. oxaloacetate + 2 H+ + 2 e– -> malate
pyruvate + 2 H+ + 2 e– -> lactate –0.18 V
–0.19 V
C. cytochrome c (Fe3+) + e– -> cytochrome c (Fe2+)
½ O2 + 2 H+ + 2 e– -> H2O +0.25 V
+0.82 V

Explanation / Answer

For the election transport chain, just watch your H+ ions. If H+ is being added, your reduced. If H+ ions are removed, your being oxidized. Also, your energy in this instance will go from high to low, a more stable situation. A. NADH will be oxidized, NAD is reduced cytochrome c oxidized (fe3+) , cytochrome c (fe 2+) reduced B. malate oxidized, oxaloacetate reduced pyruvate reduced, lactate oxidized C. oxygen is reduced, water is oxidized i wasnt sure if you need the reverse reaction so gave you both factors.

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.