engineering chemistry MCQ #2154

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

engineering chemistry MCQ #2154

  1. Question 1

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

    • A) 0.33 M
    • B) 0.5 M
    • C) 0.67 M
    • D) 0.25 M

    Answer: 0.33 M

    Explanation: Using Kc = [CO2][H2]/[CO][H2O] and assuming x M react, we get 4 = x²/(1-x)², solving gives x = 2/3.