Question Detail
Question
The reaction A + 2B → products has been found to have the rate law, rate = k[A][B]². While holding the concentration of A constant, the concentration of B is increased from x to 3x. Predict by what factor the rate of reaction increases.
Correct Answer
Option D is the correct answer.
Detailed Explanation
Initial rate = k[A][B]². If [B] triples (from x to 3x), new rate = kA² = k[A] × 9x² = 9 × k[A]x². Factor = 9.
Hint
The rate depends on [B]², so tripling B increases the rate by a factor of 3² = 9.