Different K's

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Drew Myers 4G
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

Different K's

Postby Drew Myers 4G » Sat Jan 11, 2020 9:49 pm

When are we supposed to use Kp, and when are we supposed to use Kc?

Shutong Hou_1F
Posts: 117
Joined: Sat Sep 14, 2019 12:17 am

Re: Different K's

Postby Shutong Hou_1F » Sat Jan 11, 2020 10:02 pm

I think that when the reactants and products, except pure liquids and solids, are all gases, we should use Kp, whereas using Kc is also okay. But when they are not. we can only use Kc.

Lauren Stack 1C
Posts: 100
Joined: Sat Aug 17, 2019 12:18 am

Re: Different K's

Postby Lauren Stack 1C » Sat Jan 11, 2020 10:40 pm

I believe the Kc and Kp stand for Kc (concentration) and Kp (pressure) respectively. Thus you can use Kc or Kp for gases, as they can be represented as either, but for aqueous solutions you can only denote them using concentration (Kc)

Noe BM 1J
Posts: 50
Joined: Sat Sep 07, 2019 12:17 am

Re: Different K's

Postby Noe BM 1J » Sun Jan 12, 2020 12:34 am

Kc is the equilibrium constant when using concentrations and Kp is for when using pressures.

VioletKo3F
Posts: 103
Joined: Sat Sep 07, 2019 12:18 am

Re: Different K's

Postby VioletKo3F » Sun Jan 12, 2020 2:21 am

The c in Kc stands for concentration while the p in Kp stands for pressure. It just depends on which you are using to determine the K.

Ayushi2011
Posts: 101
Joined: Wed Feb 27, 2019 12:17 am

Re: Different K's

Postby Ayushi2011 » Sun Jan 12, 2020 7:58 am

Kp is equilibrium constant for pressure whereas Kc is for concentrations.


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