Chapter 15, Problem 47E

One important reaction in the citric acid cycle is

$\text{citrate}\left(\text{aq}\right)\rightleftharpoons \text{aconitate}\left(\text{aq}\right){\text{+H}}_{\text{2}}\text{O}\left(\text{l}\right)\text{K=0}\text{.031}$

Write the equilibrium constant expression for the above reaction reaction. Given that the concentrations of $\left[\text{citrate}\left(\text{aq}\right)\right]=4.0\times {10}^{-4}$ , and $\left[{\text{H}}_{\text{2}}\text{O}\right]\text{=55}\text{.5M}$ , calculate the reaction quotient. Is this reaction at equilibrium? If not, in which direction will it proceed?