alleryStart learning →For rate = k[A]^2[B], what is the overall order of the reaction?
AFirst order overall
BThird order overall
CSecond order overall
DZero order overall
Answer & Solution
Correct answer: B. Third order overall
1. The exponent on [A] is 2, so the reaction is second order in A.
2. The exponent on [B] is 1, so the reaction is first order in B.
3. The overall order is the sum of the individual orders, which is 2 plus 1.
4. So the reaction is third order overall.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 12 "Kinetics", section 12.3 Rate Laws_
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