Determining catalysts

Arrhenius Equation:

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Katherine Grillo 1B
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Joined: Fri Sep 28, 2018 12:28 am

Determining catalysts

Postby Katherine Grillo 1B » Sat Mar 16, 2019 7:08 pm

If given a general reaction mechanism like

Step 1 (Fast): 2A + B -> C
Step 2 (Slow): C + D -> 2E

How do we determine what the intermediates and catalysts are?

This is question 12a on Lyndon's practice final btw

Posts: 57
Joined: Fri Sep 28, 2018 12:28 am

Re: Determining catalysts

Postby Timothy_Yueh_4L » Sat Mar 16, 2019 7:16 pm

Intermediates are created and used up therefore it doesn't show up in the overall reaction whereas catalysts appear in the beginning and the end of a reaction. In this example, the intermediate is C and there are no catalysts.

Ashish Verma 2I
Posts: 59
Joined: Fri Sep 28, 2018 12:28 am

Re: Determining catalysts

Postby Ashish Verma 2I » Sat Mar 16, 2019 7:24 pm

I believe you would use the definition of an intermediate and a catalyst to determine that.
By definition, an intermediate is not present at the start or end of a reaction, it is created and used up within the process of the reaction. In this case none of the components fit that definition.
On the contrary, a catalyst is present at the beginning of the reaction but is used up during the process, such as C in the case of this reaction.

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