MCAT General Chemistry Question 216: Answer and Explanation
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Question: 216
1. In the reaction A + 2 B → C, the rate law is experimentally determined to be rate = k[B]2. What happens to the initial rate of reaction when the concentration of A is doubled?
- A. The rate doubles.
- B. The rate quadruples.
- C. The rate is halved.
- D. The rate is unchanged.
Correct Answer: D
Explanation:
D Since the rate law is independent of [A], (i.e., rate is only dependent on the concentration of B), changing the amount of A will have no effect on the rate.