How to distinguish the intermediates and catalysts?


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Baoying Li 1B
Posts: 113
Joined: Sat Aug 17, 2019 12:18 am

How to distinguish the intermediates and catalysts?

Postby Baoying Li 1B » Thu Mar 12, 2020 7:50 am

Hey. How do you distinguish the intermediates and catalysts by looking at the reactions? What should be appeared in the overall reaction?

Rebekah Alfred 1J
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Joined: Thu Jul 11, 2019 12:15 am
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Re: How to distinguish the intermediates and catalysts?

Postby Rebekah Alfred 1J » Thu Mar 12, 2020 8:01 am

This video might help you understand how to distinguish between intermediates and catalysts:
https://www.brightstorm.com/science/chemistry/chemical-reaction-rates/tips-on-differentiating-between-a-catalyst-and-an-intermediate/

BNgo_2L
Posts: 95
Joined: Wed Sep 11, 2019 12:17 am

Re: How to distinguish the intermediates and catalysts?

Postby BNgo_2L » Thu Mar 12, 2020 8:17 am

Intermediates are first seen as products and then are used as a reactant for another step. Catalysts are used first as reactants to speed up a mechanism and then reappear as products as they are never consumed in a reaction (used up and then reform). The overall reaction equation should only include those that aren't intermediates nor catalysts as the appearance of intermediates and catalysts as both reactants and products will cancel them out.

Nikki Razal 1L
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Re: How to distinguish the intermediates and catalysts?

Postby Nikki Razal 1L » Thu Mar 12, 2020 9:06 am

Intermediates are produced and then consumed, and catalysts are consumed and then (re)produced

ELu 1J
Posts: 51
Joined: Thu Jul 25, 2019 12:16 am

Re: How to distinguish the intermediates and catalysts?

Postby ELu 1J » Thu Mar 12, 2020 9:12 am

You'll find that intermediates are the product of the first reaction step and then the reactant of the second reaction step - that is why it's called an intermediate because it ties the two steps together for the overall reaction. For a catalyst, it appears as a reactant and is not consumed in the reaction so it will appear as a product of the same reaction.

Michael Nguyen 1E
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Joined: Sat Aug 17, 2019 12:17 am

Re: How to distinguish the intermediates and catalysts?

Postby Michael Nguyen 1E » Thu Mar 12, 2020 9:22 am

An intermediate will first appear as a product and then appear again as a reactant. Catalysts are the opposite. They will first appear as a reactant and then appear again as a product. Note than neither intermediates nor reactants will show up in the overall balanced equation.

Christine Honda 2I
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Joined: Sat Sep 14, 2019 12:17 am

Re: How to distinguish the intermediates and catalysts?

Postby Christine Honda 2I » Thu Mar 12, 2020 9:23 am

A catalyst is always regenerated!

Cole Woulbroun 1J
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Joined: Thu Jul 25, 2019 12:16 am

Re: How to distinguish the intermediates and catalysts?

Postby Cole Woulbroun 1J » Fri Mar 13, 2020 7:49 pm

While an intermediate is produced then consumed, a catalyst is consumed then regenerated.

smurphy1D
Posts: 51
Joined: Mon Nov 18, 2019 12:18 am

Re: How to distinguish the intermediates and catalysts?

Postby smurphy1D » Sat Mar 14, 2020 6:49 am

A catalyst in consumed first, whereas an intermediate is produced fist.


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