Explore BrainMass
Share

Standard Reduction Potential of Any Redox Pair

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!

Standard Reduction Potentials: The standard reduction potential, E10, of any redox pair is defined for the half-cell reaction:

Oxidizing agent + n electrons -----> reducing agent

The E10 value for the NAD+/ NADH and pyruvate/lactate conjugate redox pairs are -0.32 V and -0.19 V, respectively.
(a) Which conjugate pair has the greater tendency to lose electrons? Explain.
(b) Which is the stronger oxidizing agent? Explain
(c) Beginning with 1m concentration of each reactant and product at pH 7, in which direction will the following reaction proceed?
Pyruvate + NADH +H+ ------> lactate + NAD+
(d) What is the standard free-energy change (∆G10) at 25 degrees C for the conversion of pyruvate to lactate?
(e) What is the equilibrium constant (K'eq) for this reaction?

Please see attached for full question.

© BrainMass Inc. brainmass.com October 24, 2018, 6:00 pm ad1c9bdddf
https://brainmass.com/chemistry/electrochemical-potentials/28250

Attachments

Solution Preview

Solution:
a) NAD+/NADH has greater tendency to lose electrons because they are water soluble cofactors. So these cofactors readily diffuse from the surface of one enzyme to another, acting as a water soluble carrier of electrons.

b) Pyruvate/Lactate is the ...

Solution Summary

Solution includes explanation and calculations. 185 words.

$2.19
See Also This Related BrainMass Solution

General High School Chemistry Questions

### Please refer to the actual attached document as everything is properly formatted and easier to see in the document. ###

1. For each of the following situations, identify those for which a reaction is likely to occur. For those that do occur, write a net ionic equation.
a) A solution of lead(ll) nitrate mixed with a solution of sodium chloride:
b) A solution of sodium sulfate mixed with a solution of calcium chloride:
c) A solution of magnesium acetate mixed with a solution of silver nitrate

2. Explain why you would expect a BeCl2 molecule to be linear but an SCl2 molecule to be angular.

3. Use the standard enthalpies of formation to determine the change in enthalpy for the combustion of methane gas (CH4(g)).

4. In the reaction, H3BO3 + IO3-  HIO3 + H2BO3-, calculate whether the products or the reactants are favored at equilibrium.

5. Calculate the voltage of a standard cell with the following oxidation-reduction reaction.
I2 + Cu  2I- + Cu2+

6. Draw and give the IUPAC name for 5 isomers of C4H7Cl

7. Give structural formulas for the following compounds.
a) Ethylmethylamine
b) 3-ethyl-2methylhexanol
c) Butyl ethanoate
d) 3-ethyl-2-hexanone
e) 2,3-dimethylpentanal

8. Balance the following equations by the half-cell method. Show both half-cell reactions and identify them as oxidation or reduction.
a) SO32- + MnO4- + H+  Mn2+ + SO42- + H2O(l)
b) Cl2(g) + OH-  Cl- + ClO3- + H2O(l)
c) SO42- + I- + H+  S2- + I2(s) + H2O(l)

View Full Posting Details