## catalyst vs intermediate

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

Emily Duggan 1F
Posts: 42
Joined: Fri Sep 29, 2017 7:07 am

### catalyst vs intermediate

how do we determine the difference between the two since they are on both sides of the equation when given the steps to a reaction mechanism and we have to write the overall reaction? Thanks!

Virpal Gill 1B
Posts: 32
Joined: Thu Jul 27, 2017 3:00 am

### Re: catalyst vs intermediate

If it is serving as a reactant in the first step and then being produced in the second step then it is a catalyst. On the other hand, an intermediate must first be formed by one of the steps and then used up in later steps.

Mike Matthews 1D
Posts: 59
Joined: Fri Sep 29, 2017 7:04 am

### Re: catalyst vs intermediate

A catalyst will appear in both the reactants and products since it is not consumed during a reaction. On the other hand, an intermediate does not appear in the reactants or products because the intermediate is produced and consumed during the course of a reaction.