Order of the Reaction

Definition

The order of a reaction refers to the power dependence of the rate on the concentration of each reactant. It provides insight into the number of molecules that are involved in the reaction.

Related terms

Rate Law:

A mathematical relationship obtained by comparing reaction rates with concentrations; it shows how the rate depends on concentrations.

Molecularity:

The number of molecules that come together to react in a single step within a reaction mechanism.

Rate Constant:

A proportionality constant in the rate law which is specific for a given reaction at a particular temperature.