MDCAT Chemistry MCQ #5141

The rate constant for a second-order reaction is 0.05 M^(-1)s^(-1). If the initial concentration is 0.2 M, what is the half-life?

MDCAT Chemistry MCQ #5141

  1. Question 1

    Q1. The rate constant for a second-order reaction is 0.05 M^(-1)s^(-1). If the initial concentration is 0.2 M, what is the half-life?

    • A) 100 s
    • B) 50 s
    • C) 200 s
    • D) 400 s

    Answer: 100 s

    Explanation: For second-order reactions, t1/2 = 1/(k[A]0) = 1/(0.05 × 0.2) = 100 s.