engineering chemistry MCQ #2136

For the reaction CO + H2O ⇌ CO2 + H2, if the initial concentrations of CO and H2O are 1M each, and Kc = 4, what is the equilibrium concentration of CO?

engineering chemistry MCQ #2136

  1. Question 1

    Q1. For the reaction CO + H2O ⇌ CO2 + H2, if the initial concentrations of CO and H2O are 1M each, and Kc = 4, what is the equilibrium concentration of CO?

    • A) 1/3
    • B) 1/5
    • C) 2/3
    • D) 1/2

    Answer: 2/3

    Explanation: Let x be the concentration of CO2, then Kc = x²/(1-x)² = 4, x = 2/3, so [CO] = 1 - 2/3 = 1/3