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

Write the equilibrium constant expression for the above reaction. Given the following data for this reaction, [citrate] = 0.00128 M, [NAD_ox] = 0.00868 M, [H₂O] = 55.5 M, [CO₂] = 0.00868 M, [NAD_red] = 0.00132 M, and [oxoglutarate] = 0.00868 M, calculate the reaction quotient. Is this reaction at equilibrium? If not, in which direction will it proceed?

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citrate(aq) + NADox(aq) + H₂O(1) CO₂(aq) + NADred + oxoglutarate(aq) K = 0.387