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Use the half reactions and standard reduction potentials provided below to calculate the ΔGo’ of: lactate...

Use the half reactions and standard reduction potentials provided below to calculate the ΔGo’ of: lactate + NAD+ → Pyruvate + NADH + H+ NAD+ + H+ + 2e- → NADH (Eo’ = -0.320 V) lactate → pyruvate + 2H+ + 2e- (Eo’ = 0.185 V) Answer: 26.10 kJ/mol

Please explain steps

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Answer #1

NAD+ + H+ + 2e- → NADH            Eo’ = -0.320 V

lactate → pyruvate + 2H+ + 2e-      Eo’ = 0.185 V

_______________________________________

lactate + NAD+ -------------> pyruvate + NADH + H+

Eocell = Eored - Eooxidation

Eo = - 0.320 + 0.185

     = - 0.135 V

ΔGo   = - n F Eo

         = - 2 x 96500 x - 0.135 x 10^-3

ΔGo   = 26.10 kJ /mol

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