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Question
For a reaction A + B ⟶ P, the rate is given by
Rate = k [A] [B]2
What is the overall order of reaction if A is present in large excess?
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Solution 1
If A is present in large excess, then the reaction will be independent of the concentration of A and will be dependent only on the concentration of B. As [B]2 will be the only determining factor in the order of reaction, the overall order of the reaction will be two.
Solution 2
If A is present in large excess, then the rate of the reaction will be independent of A and will depend only on the concentration of B. The overall rate of the reaction will be 2.
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