## Catalysts

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

Andy Nguyen 1A
Posts: 56
Joined: Thu Jul 27, 2017 3:00 am

### Catalysts

How do we know if there is a catalyst in a reaction mechanism?

Kaylin Krahn 1I
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Joined: Fri Sep 29, 2017 7:04 am
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### Re: Catalysts

if it is seen in the overall reactant and also in the products therefore "cancelling out" and not being consumed

Julian Krzysiak 2K
Posts: 49
Joined: Fri Sep 29, 2017 7:07 am

### Re: Catalysts

We know if there is a catalyst if it was present in the reactants in the first step, and is present as a product in the last step. It is never consumed.
This is opposed to an intermediate, which is formed in the first step and later consumed in a later step.

A+B->C
C+D->E+B
A+D->E

In this, B is the catalyst, and C is the intermediate. Notice how both are absent from the overall equation, but only C was used up, while B is still present at the end.

Guangyu Li 2J
Posts: 50
Joined: Fri Sep 29, 2017 7:07 am
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### Re: Catalysts

First, you need to make sure that if a certain molecule speeds up the reaction. Second, you need to check that if the molecule is not consumed in the process of the reaction. If a given molecule satisfied both of the two standards, it is a catalyst.