Chapter 15, Problem 48E

The following reaction is an important reaction in the citric acid cycle:

$\begin{array}{l}\text{citrate}\left(\text{aq}\right)+NA{D}_{ox}\left(aq\right)+H_{2}O\left(l\right)\rightleftharpoons \\ C{O}_2\left(aq\right)+NA{D}_{red}+oxoglutarate\left(aq\right)K=0.387\end{array}$

Write the equilibrium constant expression for the above reaction. Give the following data for this reaction, $\left[\text{citrate}\right]=0.00128\text{M,}{\text{[NAD}}_{\text{ns}}]=0.00868\text{M,}\left[{\text{H}}_{\text{2}}\text{O}\right]=55.5\text{M}$ , $\left[{\text{NAD}}_{\text{res}}\right]\text{=0}\text{.00132M}$ , and $\left[\text{oxoglutarate}\right]=0.00866\text{M}$ , calculate the reaction quotient. Is this reaction at equilibrium? If not, in which direction will it proceed?