## Identifying a catalyst in a reaction

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

Hailey Johnson
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Joined: Wed Nov 16, 2016 3:04 am

### Identifying a catalyst in a reaction

How do we differentiate between an intermediate and a catalyst in a reaction mechanism if they both cancel out and are not included in the overall chemical equation?

Michelle Steinberg2J
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Joined: Fri Sep 29, 2017 7:04 am

### Re: Identifying a catalyst in a reaction

An intermediate is produced and then used. A catalyst, however, is used and then later produced.
Look at which sides of the equation they appear on :)

Veritas Kim 2L
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Joined: Fri Sep 29, 2017 7:05 am

### Re: Identifying a catalyst in a reaction

Yes, intermediates will always appear as the products first and then used up as a reactant in the following step. However, catalysts will always appear on the reactant side first. Catalysts are not consumed!

Rishi Khettry 1L
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### Re: Identifying a catalyst in a reaction

Intermediates will always be consumed while catalysts are not consumed.

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### Re: Identifying a catalyst in a reaction

Intermediates appear as products and then are consumed in later steps while catalysts are present in the beginning of the mechanism, used in one of the steps, then produced so as not to be consumed in the overall rxn.