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catalyst

Posted: Fri Mar 13, 2020 1:57 pm
by kevinolvera1j
Are all zero order reactions dependent on a catalyst?

Re: catalyst

Posted: Fri Mar 13, 2020 2:02 pm
by Selena Yu 1H
No, not all zero order reactions is dependent on a catalyst. A zero order reaction could also occur with an enzyme or a surface. It's just that most commonly you would find a catalyst with a zero order reaction.

Re: catalyst

Posted: Fri Mar 13, 2020 2:15 pm
by kevinolvera1j
Selena Yu 1H wrote:No, not all zero order reactions is dependent on a catalyst. A zero order reaction could also occur with an enzyme or a surface. It's just that most commonly you would find a catalyst with a zero order reaction.

Aren't enzymes just biological catalysts?

Re: catalyst

Posted: Fri Mar 13, 2020 2:29 pm
by Diana A 2L
kevinolvera1j wrote:
Selena Yu 1H wrote:No, not all zero order reactions is dependent on a catalyst. A zero order reaction could also occur with an enzyme or a surface. It's just that most commonly you would find a catalyst with a zero order reaction.

Aren't enzymes just biological catalysts?



AHHH yes they are! Let me provide a better answer.

A zero-order reaction is when rate is just k right, so it doesn’t depend on the concentrations of the reactants.
And a catalyst is not present in the overall chemical reaction, but they’re just there as a pathway of lower activation energy.

Rather, zero-order reactions usually DESCRIBE catalysts, because regardless of how much the concentration of the reactant changes, the rate will be determined by k, or specifically, how much the catalyst can handle basically.

Re: catalyst

Posted: Fri Mar 13, 2020 2:40 pm
by Diana A 2L
Here’s a link to offer a more detailed explanation!


https://chem.libretexts.org/Core/Physic ... _Reactions

Re: catalyst

Posted: Fri Mar 13, 2020 2:52 pm
by Kayla Maldonado 1C
A zero order reaction can simply be when a material such as the surface or catalyst are saturated by the reactants so no a catalyst isn't necessary to make a reaction zero order. In this type of reaction, the limiting factor is something besides concentration which can possibly be a catalyst, but this is not always the case.