## Catalysts in a reaction

$V_{0} = \frac{V_{max}[S]}{K_{M} + [S]}; K_{M} = \frac{[E][S]}{[ES]}$

Natalie LeRaybaud 1G
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Joined: Thu Jul 13, 2017 3:00 am

### Catalysts in a reaction

Do catalysts always appear on the left side of the reaction initially and then move to the right in the second step of the reaction?

Ishan Saha 1L
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Joined: Fri Sep 29, 2017 7:03 am

### Re: Catalysts in a reaction

If the catalyst shows up in the reactant side, then it must show up again in the products side of the equation at some step (not necessarily only the second) because catalysts cannot be totally consumed by the reaction.

CalebBurns3L
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### Re: Catalysts in a reaction

At some point in the reaction mechanism, the catalyst would show up on the left side as well because it is important that the enzyme cancels when you add up the elementary steps.

Clarissa Molina 1D
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### Re: Catalysts in a reaction

How can we tell if a substance is a catalyst or an intermediate?

Oscar Valdovinos 1I
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### Re: Catalysts in a reaction

If the substance shows up in the products and isnt cancelled out later by a reactant, then it can not be an intermediate.

YashDeshmukh1D
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### Re: Catalysts in a reaction

Intermediates are produced by one of the reaction steps, meaning it first appears as a product. It then acts as a reactant in subsequent steps, ensuring that it is cancelled out in the overall reaction.

Varsha Swamy 2J
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### Re: Catalysts in a reaction

Catalysts go from reactant to product, while intermediates go from product to reactant.

Elizabeth Bamishaye 2I
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### Re: Catalysts in a reaction

Varsha Swamy 2J wrote:Catalysts go from reactant to product, while intermediates go from product to reactant.

Yes! Intermediates are not in the overall reaction too; they are produced then consumed. Catalysts are consumed then produced.

Ruby Richter 2L
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### Re: Catalysts in a reaction

I'm a little confused so catalysts are consumed in a reaction?

Amanda Lin 2I
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### Re: Catalysts in a reaction

Catalysts are regenerated. They are used up, then produced.

chari_maya 3B
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### Re: Catalysts in a reaction

How can you tell the difference between a catalyst and an intermediary?