Change in Conc

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Ashley Lopez 3J
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Joined: Wed Sep 30, 2020 10:06 pm

Change in Conc

Postby Ashley Lopez 3J » Sun Jan 10, 2021 2:55 pm

Does a change in concentration have or not have an effect on the system? Will there ever be a time when a change in conc changes K?

Halle Villalobos 3E
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Joined: Wed Sep 30, 2020 9:52 pm

Re: Change in Conc

Postby Halle Villalobos 3E » Sun Jan 10, 2021 2:56 pm

Hi! To my understanding, no. The change in concentration is due to an increase/decrease in volume. And since K is a ratio, it remains constant no matter how much you alter the volume of the system. I hope this helps!

Andreas Krumbein 1L
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Joined: Wed Sep 30, 2020 10:00 pm

Re: Change in Conc

Postby Andreas Krumbein 1L » Sun Jan 10, 2021 2:59 pm

A change in concentration has an effect on the system insofar as it requires the system to adjust the concentrations of the products and reactants in order to reestablish equilibrium (this is where the relationship between Q and K comes in, as mentioned in Wednesday's lecture), but a change in the concentration will never change the K value of a reaction.

Bailey Giovanoli 1L
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Joined: Wed Sep 30, 2020 9:50 pm

Re: Change in Conc

Postby Bailey Giovanoli 1L » Sun Jan 10, 2021 3:00 pm

A change in concentration does not change K. Concentration change does not affect K because the ratio of reactants and products formed from the increase will offset the increased concentration of one of the reactants or products. For example, if you added more product, the reaction would be out of equilibrium. To reach equilibrium again, the product would reverse react to form more product until K is equal to Q.

Annie Liang 3D
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Joined: Mon Jun 17, 2019 7:25 am

Re: Change in Conc

Postby Annie Liang 3D » Sun Jan 10, 2021 3:05 pm

Changing the concentration will result in a favoring of the forward or reverse reaction in order to adjust to the change. Although the concentrations in the system will change, the K value remains the same because the ratio does not change.
I believe that changing the concentration will never change the value of K. Only temperature will change K.

Charmaine Ng 2D
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Joined: Wed Sep 30, 2020 9:37 pm

Re: Change in Conc

Postby Charmaine Ng 2D » Sun Jan 10, 2021 3:13 pm

The concentrations might change, but the mixture would eventually reach equilibrium at K again, so I don't think it will affect K!

Anna Lockhart 2B
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Joined: Tue Nov 17, 2020 12:19 am

Re: Change in Conc

Postby Anna Lockhart 2B » Sun Jan 10, 2021 3:49 pm

So does a change in concentration affect the system in the present? Meaning that it does not affect equilibrium because that constant will remain the same, but it will have an effect on the system before it returns to equilibrium.

Madilyn Schindler 3E
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Re: Change in Conc

Postby Madilyn Schindler 3E » Sun Jan 10, 2021 3:52 pm

A change in concentration causes the forward and reverse reactions to occur at different rates, causing the system to be out of equilibrium. However, the system will eventually return to equilibrium and have the same K value. The K value only changes when there is a change in temperature.

manisha_joseph_1H
Posts: 87
Joined: Wed Sep 30, 2020 10:01 pm

Re: Change in Conc

Postby manisha_joseph_1H » Sun Jan 10, 2021 4:16 pm

A change in the concentration of the reactants or products will initially have an affect on the reaction, however, after a certain amount of time has passed, the reaction will return to equilibrium and K will remain unchanged.


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