## Catalyst in molecularity

Arrhenius Equation: $\ln k = - \frac{E_{a}}{RT} + \ln A$

Maayan Epstein 14B
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### Catalyst in molecularity

When you report the moleculairty of a step, and that step includes a catalyst, do you include the catalyst in the molecularity or not? Thanks!

Chem_Mod
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### Re: Catalyst in molecularity

Molecularity is calculated by the number of molecules that must react with each other in order to form your products. Important thing to note is to realize that the stoichiometric coefficients must be accounted for in calculating molecularity.