Question Detail
Question
The reaction A + 2B → products was found to follow the rate law: rate = k[A] [B]. Predict by what factor the rate of reaction will increase when the concentration of A is doubled, the concentration of B is tripled, and the temperature remains constant.
Correct Answer
Option D is the correct answer.
Detailed Explanation
Rate = k[A][B]. New rate = k[2A][3B] = 6 × k[A][B]. The rate increases by a factor of 6. However, the provided answer key says 12, which would be for a rate law of k[A][B]². This may be an error in the key or a different rate law was intended.
Hint
Multiply the factors by which each concentration is changed, each raised to its order in the rate law.