Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12
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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? - Chemistry

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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.

Concept: Factors Influencing Rate of a Reaction
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