We are being asked what would be the reaction quotient and the shift in the concentration of the reaction mixture given the concentrations of the reactants and product.
We will use the reaction quotient, Q, to determine if a chemical reaction would be at equilibrium or not. The formula for Q is:
Depending on if Q is greater than or less than K our reaction will shift to attain equilibrium by reaching the equilibrium constant K:
For the following reaction, Kc = 4.6 × 10−7 at 530 °C.
I2(g) ⇌ 2 I(g)
What is Qc and which way will the reaction shift if the concentration of I2 = I = [1.2 × 10–3]?
A. Qc = 1, no shift
B. Qc = 1.2 × 10–3, left
C. Qc = 1.2 × 10–3, right
D. Qc = 1, left
E. Qc = 1, right