Chemistry / Unit 9 Chem 1635 short lesson, about 20 seconds
Overall Reaction Order
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The idea
A reaction's overall order is the sum of the individual orders of every reactant appearing in its rate law.
In practice
The rate law rate = k[H+][OH−] is first order in each ion, an overall order of two.
Where people slip
Overall order sums the exponents actually written in the rate law — a reactant absent from it contributes zero, not one.
Your place on the trail
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