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  3. 1 below are the half reactions for sulfate reduction using...

Question: 1 below are the half reactions for sulfate reduction using...

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1) Below are the half reactions for sulfate reduction using acetate as a source of electrons, energy, and carbon.

CO2 + 8e- -> CH3COO- (-0.29 volts)

SO42- + 8e- -> H2S (-0.22 volts)

If you balance and combine the reactions so that 34 molecules of CH3COO- are oxidized to CO2, how many electrons are transfered from carbon to sulfur?

2)

Below are the half reactions for sulfate reduction using acetate as a source of electrons, energy, and carbon.

2CO2 + 8e- -> CH3COO-(-0.29 volts)

SO42-+ 8e- -> H2S (-0.22 volts)

Using the information given, calculate the ΔE for this reaction, balance the full reaction to determine the n, the number of electrons transfered when 7 molecules of SO42-are reduced. Finally, use the simplified Nernst Equation

ΔG = -nFΔE, where F = 96.48 kJ (mol e-)

to determine the Gibbs Free energy available to do work!

  • Report your answer in kJ per mole rounded to two decimal places.
  • Report only the numeric portion of your answer
    • e.g. 1.01, not 1.01 kj per mole.
  • Answers should ALWAYS be negative since this is a spontaneous reaction.

3)

Synonym for the reduced form of CoQ

Alternate Wording: The reduced form of CoQ is also known as ___.

There may be one or more correct answers.

Quinone

Glyoxylate Cycle

FMN (also known as Complex 1)

NADH

Citric Acid Cycle

Quinol

FAD

Cytochrome

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