In a Redox Reaction, the Reduction Potential E Depends on the Ratio

question 48

Multiple Choice

In a redox reaction, the reduction potential E depends on the ratio of product concentrations ([C] and [D]) to reactant concentrations ([A]  and  [B]) , as per equation E  =  E°'  -  60  (mV/n)   log  [C][D]/[A][B]. What would be the effect of increasing the ratio of products to reactants by a factor of 10?

• A) No effect: E°' assumes 1-M concentrations of reactants and products.
• B) A change of -60 mV will not modify the estimate of E.
• C) The value of E will decrease by 60 mV, decreasing energy yield.
• D) The value of E will increase by 60 mV, increasing energy yield.
• E) The E°' term is unaffected by changes in concentrations of products or reactants.

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