Chapter 19, Problem 109FP

Some electrochemical cells employ large biological molecules known as enzymes. Art enzyme increases the rate of a biochemical reaction Some enzymes perform oxidation reactions and some others perform reduction reactions An electrochemical cell a sec on the use of enzymes is given in the following illustration.

The half-cell reactions for electrochemical cell and the corresponding reduction potentials are given below. The symbol $E^{a1}$ is used here because these values refer to the biological standard state: $37°\text{C}$ , $a_{tt}={10}^7$ , all other activities equal to 1.

$\begin{array}{l}\text{Anode:}{\text{C}}_6{H}_{10}{O}_6\left(aq\right)+2H^{+}\left(aq\right)+2e^{-}\rightleftharpoons {\text{C}}_{\text{6}}{\text{H}}_{\text{12}}{\text{O}}_{\text{6}}\left(\text{aq}\right)E°=-0.3583\text{V}\\ \text{Cathode:}{\text{O}}_{\text{2}}\left(\text{g}\right)+4{\text{H}}^{\text{+}}\left(\text{aq}\right)+4e^{-}\rightleftharpoons {\text{2H}}_{\text{2}}\text{O}\left(\text{l}\right)E°=0.82V\end{array}$

a. Write an equation for the overall reaction occurring in this electrochemical cell.

b. Write a cell diagram for this battery.

c. Calculate the standard cell potential for the electrochmical reaction.