engineering chemistry MCQ #2165

The equilibrium constant Kc for the reaction A + B ⇌ C is 4. If the initial concentrations of A and B are 1 M each, what is [C] at equilibrium?

engineering chemistry MCQ #2165

  1. Question 1

    Q1. The equilibrium constant Kc for the reaction A + B ⇌ C is 4. If the initial concentrations of A and B are 1 M each, what is [C] at equilibrium?

    • A) 0.67 M
    • B) 0.5 M
    • C) 0.8 M
    • D) 0.2 M

    Answer: 0.67 M

    Explanation: Using Kc = [C]/[A][B] and assuming x M react, 4 = x/(1-x)², solving gives x = 0.67 (approx).