## Catalyst

$K = \frac{k_{forward}}{k_{reverse}}$

Frances Relampagos 1J
Posts: 9
Joined: Fri Sep 25, 2015 3:00 am

### Catalyst

How do you determine the catalyst in a multi-step reaction?

Christina Quigg 4G
Posts: 20
Joined: Fri Sep 25, 2015 3:00 am

### Re: Catalyst

In a multi-step reaction, a catalyst is something that is used up earlier in the reaction and reappears later. For example, catalysts usually appear on the reactants side of the equation first and then reappear in the products side in a later step.

Example:
A+E->G
A+B->C
C->B+D
D+E->F
F->G
In this example, B is the catalyst because it does not appear in the overall reaction and it appears in a early set before being reformed again.

I hope this helps!