Question Detail
Question
If a reaction’s rate law is rate = k[A][B], what will happen to the rate if [A] is doubled and [B] is halved?
Correct Answer
Option A is the correct answer.
Detailed Explanation
The rate law is rate = k[A][B]. If [A] becomes 2[A] and [B] becomes (1/2)[B], the new rate is k * (2[A]) * ((1/2)[B]) = k[A][B]. The rate is unchanged.
Hint
Substitute the changes into the rate law. What is 2 multiplied by 1/2?