Catalysts

Moderators: Chem_Mod, Chem_Admin

305572238
Posts: 74
Joined: Fri Sep 24, 2021 7:15 am

Catalysts

Postby 305572238 » Sun Jan 16, 2022 11:54 am

According to Le Chatelier's principle, do catalysts shift the reaction?

Devika Nair 2D
Posts: 108
Joined: Fri Sep 24, 2021 5:51 am
Been upvoted: 1 time

Re: Catalysts

Postby Devika Nair 2D » Sun Jan 16, 2022 11:56 am

No, catalysts do not shift a reaction, they simply speed it up. The equilibrium constant is unchanged, and the equilibrium concentration values are unchanged.

Riya Sawhney 1C
Posts: 104
Joined: Fri Sep 24, 2021 5:07 am

Re: Catalysts

Postby Riya Sawhney 1C » Sun Jan 16, 2022 3:01 pm

Catalysts lower the activation energy of the reaction, so it will proceed more quickly, but a catalyst will not shift the equilibrium. The value of the equilibrium constant does not change with the introduction or removal of a catalyst.

Janice Hu 2L
Posts: 104
Joined: Fri Sep 24, 2021 5:24 am
Been upvoted: 2 times

Re: Catalysts

Postby Janice Hu 2L » Sun Jan 16, 2022 3:06 pm

Catalysts don't shift equilibrium, but they do help the reaction establish equilibrium sooner by lowering activation energy (the energy required for an reaction to occur).

Arjun_Anumula_3E
Posts: 107
Joined: Fri Sep 24, 2021 5:47 am
Been upvoted: 1 time

Re: Catalysts

Postby Arjun_Anumula_3E » Sun Jan 16, 2022 3:25 pm

catalysts can only affect the rate at which a reaction proceeds toward equilibrium, and as a result adding or removing it does not affects any values in the equilibrium equation. Only changes in temperature, concentrations of products or reactants, and pressure could cause a shift toward equilibrium.

Mark_Botros_1D
Posts: 111
Joined: Fri Sep 24, 2021 5:12 am

Re: Catalysts

Postby Mark_Botros_1D » Sun Jan 16, 2022 3:25 pm

Furthermore, to add to the discussion, if you add a catalyst to a reaction that has reached equilibrium, the rates of the forward and reverse reactions will be increased by the same amount and the system will remain in equilibrium.

Karen Nguyen 3E
Posts: 101
Joined: Fri Sep 24, 2021 6:38 am
Been upvoted: 1 time

Re: Catalysts

Postby Karen Nguyen 3E » Sun Jan 23, 2022 2:18 am

According to Le Chatelier's principle, catalysts do not shift the reaction. Instead, adding it speeds up the reaction by lowering the activation energy. Hope this helps!

Emaad Sohail 3F
Posts: 90
Joined: Fri Sep 24, 2021 5:13 am

Re: Catalysts

Postby Emaad Sohail 3F » Sun Jan 23, 2022 8:33 pm

Catalysts don't shift the reaction, because they speed up the forward and reverse reactions equally. If you think about it energetically, catalysts lower activation energy, which is lowered for both the forward and reverse reactions by the same amount.

Ashley Tonthat 2B
Posts: 105
Joined: Fri Sep 24, 2021 6:09 am

Re: Catalysts

Postby Ashley Tonthat 2B » Sun Jan 23, 2022 8:53 pm

Hello,

Catalysts don't shift equilibrium because they don't change the concentration of reactants or products. They only increase the rate at which the consumption of reactants turns into products. I hope this helps.

LouiseLin2L
Posts: 100
Joined: Fri Sep 24, 2021 6:27 am

Re: Catalysts

Postby LouiseLin2L » Sun Jan 23, 2022 9:01 pm

In an equilibrium, the reactions goes both ways, meaning that when a catalyst is introduced, the rate of reaction increases for reactions going both ways, hence it does not affect the equilibrium position.

Nithya Narapa Reddy
Posts: 100
Joined: Fri Sep 24, 2021 6:47 am

Re: Catalysts

Postby Nithya Narapa Reddy » Sun Jan 23, 2022 9:03 pm

Catalysts don't affect equilibrium according to Le Chatliers, however when a catalyst is introduced it reduces the activation energy which increases the rates of both forward and reverse reactions the same amount.

Angela Harrington 2L
Posts: 144
Joined: Fri Sep 24, 2021 5:22 am

Re: Catalysts

Postby Angela Harrington 2L » Sun Jan 23, 2022 9:05 pm

Catalysts only speed up a reaction. They do not cause a shift because there is no change in the concentration of products or reactants, only the rate at which reactants are converted to products changes. Hope this helps!


Return to “Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions”

Who is online

Users browsing this forum: No registered users and 5 guests