MDCAT Chemistry MCQ #5136

The rate law for the reaction A + 2B → C is rate = k[A]^2[B]. By what factor does the rate change if [A] is doubled and [B] is halved?

MDCAT Chemistry MCQ #5136

  1. Question 1

    Q1. The rate law for the reaction A + 2B → C is rate = k[A]^2[B]. By what factor does the rate change if [A] is doubled and [B] is halved?

    • A) 2
    • B) 4
    • C) 1/2
    • D) 8

    Answer: 2

    Explanation: New rate = k(2[A])^2([B]/2) = 2k[A]^2[B], so rate doubles.