For the reaction A + B <-> C the equilibrium concentrations are [A] = 0.2, [B] = 0.5 and [C] = 0.4 mol/L. What is the equilibrium constant K?
Answer and explanation
Correct answer: D. 4
- Step 1: K = [C] / ([A][B]). Step 2. = 0.4 / (0.2 x 0.5) = 4. Answer: 4. Why not the others: 0.25: That is the reciprocal. 0.04: That multiplies all three concentrations together. 0.8: That is [C]/[B].
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