engineering chemistry MCQ #2151

If Kc = 64 for the reaction A + B ⇌ C + D and initial concentrations of A and B are 1 M each, what is the equilibrium concentration of C?

engineering chemistry MCQ #2151

  1. Question 1

    Q1. If Kc = 64 for the reaction A + B ⇌ C + D and initial concentrations of A and B are 1 M each, what is the equilibrium concentration of C?

    • A) 0.8 M
    • B) 0.5 M
    • C) 0.2 M
    • D) 0.1 M

    Answer: 0.8 M

    Explanation: Using the Kc expression and assuming x M of A and B react, we get 64 = x² / (1-x)², solving gives x = 0.8.