## Catalysts

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

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Joined: Sat Sep 14, 2019 12:17 am

### Catalysts

What does it mean for a catalyst to "not be consumed during a reaction"?

Jonathan Gong 2H
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Joined: Sat Jul 20, 2019 12:16 am

### Re: Catalysts

A catalyst lowers the activation energy of a reaction but is not consumed. If you look at the elementary steps of a reaction, you will see that a catalyst is present as a reactant at the very beginning of a reaction, but is also produced as a product at the end. This means that is was not "consumed" in the reaction since it was not changed by the reaction.

Samuel Tzeng 1B
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Joined: Sat Aug 24, 2019 12:15 am

### Re: Catalysts

It means the catalyst is not consumed during the reaction

Chris Tai 1B
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Joined: Sat Aug 24, 2019 12:16 am

### Re: Catalysts

There are two types of catalysts that are both not necessarily consumed within the reaction. The first is a homogeneous catalyst, which is a same phase catalyst. This form of catalyst is made up of the same starting materials, and the reaction typically occurs within solution. The second is a heterogeneous catalyst, which is a different phase catalyst and catalysis typically occurs on a surface. In both examples, the catalyst isn't consumed by the reaction, but lowers the activation energy for the reaction to occur

KnarGeghamyan1B
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Joined: Fri Aug 09, 2019 12:15 am

### Re: Catalysts

It basically means the catalyst is not broken down into new molecules during the reaction.

Lauren Stack 1C
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Joined: Sat Aug 17, 2019 12:18 am

### Re: Catalysts

Catalysts are no consumed as they appear as an input, but also an output of a reaction. Thus, the amount of catalyst is not decreased by lowering the activation energy.