Question Detail
Question
For the reaction 2A + B → C, the rate law is rate = k[A][B]². If [A] is halved and [B] is tripled, the rate will change by a factor of:
Correct Answer
Option B is the correct answer.
Detailed Explanation
Initial rate = k[A][B]². New rate = k[½A][3B]² = k × 0.5 × 9 × [A][B]² = 4.5 × k[A][B]². Factor = 4.5.
Hint
Factor for A is 0.5, factor for B² is 3² = 9; overall = 0.5 × 9 = 4.5.