The value of the equilibrium constant for the combination of nitrogen and oxygen to make NO is 2 × 10-9. What does this tell you about the concentrations of materials in the equilibrium mixture?

Question

Quizplus · Accepted Answer

The value of the equilibrium constant (Kc) is calculated as the concentration of products divided by the concentration of reactants. Therefore, Kc = [NO]/[N2][O2]. The given value of Kc (2 × 10-9) is very small, indicating that the concentration of reactants is much higher than the concentration of products, leading to a very low yield of NO. Thus, the best choice is D, which states that the concentration of reactants exceeds the concentration of products.

The Value of the Equilibrium Constant for the Combination of Nitrogen