## Concentrations

Jorja De Jesus 2C
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### Concentrations

When is concentration the only thing that affects K and when is it not the only thing?

Lara Kristine Bacasen 1L
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### Re: Concentrations

I'm not sure if this answers your question but if the temperature is the same the concentration does not change the equilibrium constant (k). However, if you change the temperature it does change the equilibrium constant.

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### Re: Concentrations

Lara Kristine Bacasen 1L wrote:I'm not sure if this answers your question but if the temperature is the same the concentration does not change the equilibrium constant (k). However, if you change the temperature it does change the equilibrium constant.

So temperature is the only thing that can affect the the equilibrium constant ?

Lara Kristine Bacasen 1L
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### Re: Concentrations

Lara Kristine Bacasen 1L wrote:I'm not sure if this answers your question but if the temperature is the same the concentration does not change the equilibrium constant (k). However, if you change the temperature it does change the equilibrium constant.

So temperature is the only thing that can affect the the equilibrium constant ?

Yes, I believe so. If you change the concentration of something in the mixture, the position of equilibrium moves in. Like from favoring products or the reactants. This happens to fix the change that was made but the K doesn't change.

Matt F
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Joined: Sat Aug 17, 2019 12:17 am

### Re: Concentrations

Changing the concentration or pressure can cause the equilibrium to "favor" the products or reactants, but in both cases the equilibrium constant K will stay the same. Only when temperature is changed is K changed because of a permanent change in the system's dynamics (depending on if it's endothermic or exothermic)

Rory Simpson 2F
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Joined: Fri Aug 09, 2019 12:17 am

### Re: Concentrations

Concentration and pressure only affects Q and not K; the reaction will shift accordingly to return to a ratio of reactants and products equal to K. Temperature actually changes K because of the changes in energy that are involved in the reaction.

Anokhi Patel 2B
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Joined: Fri Aug 09, 2019 12:17 am

### Re: Concentrations

K is only affected by the concentration when measuring Kc instead of the K for partial pressure Kp.

Cavalli_1H
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### Re: Concentrations

concentration only affects K when you are working with Kc (involving aqueous solutions)

Jocelyn Thorp 1A
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### Re: Concentrations

Matt F wrote:Changing the concentration or pressure can cause the equilibrium to "favor" the products or reactants, but in both cases the equilibrium constant K will stay the same. Only when temperature is changed is K changed because of a permanent change in the system's dynamics (depending on if it's endothermic or exothermic)

If the reaction is exothermic, adding heat will make k go down; cooling will make k go up.
If the reaction is endothermic, adding heat will make k increase; cooling will make k decrease.

Veronica Lu 2H
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### Re: Concentrations

the concentration only affects the Kc not Kp

Sreyes_1C
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### Re: Concentrations

Lara Kristine Bacasen 1L wrote:I'm not sure if this answers your question but if the temperature is the same the concentration does not change the equilibrium constant (k). However, if you change the temperature it does change the equilibrium constant.

So temperature is the only thing that can affect the the equilibrium constant ?

Yes I believe temperature is the only thing that can affect it

TimVintsDis4L
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Joined: Sat Aug 17, 2019 12:17 am

### Re: Concentrations

Temperature is the only thing that affects the constant because even if the concentration changes, the equation will do its best to mitigate the change. Le Chatelier's Principle pretty much explains this.

005324438
Posts: 51
Joined: Sat Aug 24, 2019 12:16 am

### Re: Concentrations

Concentrations don't effect the K value in itself, but can effect the direction of the reaction. Only temperature can change the K value.