Kc vs. Kp  [ENDORSED]

Moderators: Chem_Mod, Chem_Admin

Posts: 120
Joined: Wed Sep 18, 2019 12:20 am

Kc vs. Kp

Postby Shanzey » Sat Jan 11, 2020 6:22 pm

How do we know when to use Kc or when to use Kp? Does it need to be specified which we are using, or do we have to assume that Kp applies to things in the gas phase (since it deals with partial pressure), while Kc typically is used for aqueous solutions?

Posts: 98
Joined: Wed Sep 18, 2019 12:18 am

Re: Kc vs. Kp  [ENDORSED]

Postby DesireBrown1J » Sat Jan 11, 2020 6:26 pm

Yes, KP applies to gases with partial pressures and KC is for aqueous solutions or gases with molar concentration.

Cindy Adiwidjaja 1B
Posts: 100
Joined: Sat Jul 20, 2019 12:15 am

Re: Kc vs. Kp

Postby Cindy Adiwidjaja 1B » Sat Jan 11, 2020 10:40 pm

When dealing with gases, we assume that we have to use Kp since gases have pressure. When dealing with aqueous solutions, we assume that we use Kc since aqueous solutions have concentrations.

Posts: 100
Joined: Thu Jul 11, 2019 12:17 am

Re: Kc vs. Kp

Postby MaggieHan1L » Sun Jan 12, 2020 12:15 am

Yes when we see gas we assume Kp and when we see aqueous we assume Kc.

Jessica Li 4F
Posts: 115
Joined: Fri Aug 09, 2019 12:16 am

Re: Kc vs. Kp

Postby Jessica Li 4F » Sun Jan 12, 2020 10:00 am

Kc applies to molar concentration (M) of gases or aqueous solutions, while Kp applies only to gases and is respective to their partial pressures.

Return to “Equilibrium Constants & Calculating Concentrations”

Who is online

Users browsing this forum: No registered users and 3 guests