Keq vs. Kc vs. Kp

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Adrienne_4F
Posts: 64
Joined: Fri Sep 28, 2018 12:27 am

Keq vs. Kc vs. Kp

Postby Adrienne_4F » Thu Jan 10, 2019 12:56 pm

What is the difference between Keq, Kc, and Kp? Does it matter if we use Keq for Kp since Keq is the general equilibrium constant?

Arianna Ko 2E
Posts: 33
Joined: Fri Sep 28, 2018 12:20 am

Re: Keq vs. Kc vs. Kp

Postby Arianna Ko 2E » Thu Jan 10, 2019 1:09 pm

Keq is the general equilibrium constant as you mentioned. Kc refers to when you are using the equilibrium concentration values to find the Keq value and Kp refers to when you are using the equilibrium partial pressures values to find the Keq value!

Chem_Mod
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Re: Keq vs. Kc vs. Kp

Postby Chem_Mod » Thu Jan 10, 2019 1:10 pm

Kp is more convenient if the reaction contains gases. Depend on each question, one might be better than others, but you can write any of them if there is no instruction in the question.

Marina Gollas 1A
Posts: 36
Joined: Fri Sep 28, 2018 12:20 am

Re: Keq vs. Kc vs. Kp

Postby Marina Gollas 1A » Thu Jan 10, 2019 1:11 pm

Hello,
Here is a pdf that helped me understand. I hope you can open it. If this doesn't help you or you can't open it, let me know and I can explain more. :) For using Keq for Kp, it depends, since Kp asks you to include the partial pressures of the gases with it, and its asking you to solve it using the partial pressures that most likely are given to you in the problem.
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