Kc and Kp

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Lizette Noriega 1H
Posts: 105
Joined: Wed Sep 18, 2019 12:15 am

Kc and Kp

Postby Lizette Noriega 1H » Thu Jan 09, 2020 8:18 pm

Can someone clarify the following for me? Are these the correct uses for Kc and Kp?

Kc = concentration of gases
Kp = partial pressures

EvanWang
Posts: 101
Joined: Sat Sep 07, 2019 12:16 am

Re: Kc and Kp

Postby EvanWang » Thu Jan 09, 2020 8:25 pm

Kc is used for concentration in general, it applies to aqueous solutions and gases. Kp applies to partial pressures of gases.

Baoying Li 1B
Posts: 113
Joined: Sat Aug 17, 2019 12:18 am

Re: Kc and Kp

Postby Baoying Li 1B » Thu Jan 09, 2020 8:25 pm

You are right with both Kc and Kp.
Kc is the equilibrium constant of the concentration of the aqueous solution.
Kp is the equilibrium constant of the partial pressure of the gas.

DLee_1L
Posts: 103
Joined: Sat Aug 17, 2019 12:17 am

Re: Kc and Kp

Postby DLee_1L » Fri Jan 10, 2020 10:13 am

Does Kc and Kp have to be in certain units or can we use any unit for concentration or pressure to get Kc or Kp?

Catherine Daye 1L
Posts: 104
Joined: Wed Sep 11, 2019 12:16 am

Re: Kc and Kp

Postby Catherine Daye 1L » Fri Jan 10, 2020 10:17 am

You use Kp for gases because it indicates partial pressure, since gases don’t really have a “concentration”. Kc is for concentrations of solids, liquids, and aqueous solutions.


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