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Kc vs. Kp

Posted: Sat Jan 11, 2020 6:22 pm
by Shanzey
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?

Re: Kc vs. Kp  [ENDORSED]

Posted: Sat Jan 11, 2020 6:26 pm
by DesireBrown1J
Yes, KP applies to gases with partial pressures and KC is for aqueous solutions or gases with molar concentration.

Re: Kc vs. Kp

Posted: Sat Jan 11, 2020 10:40 pm
by Cindy Adiwidjaja 1B
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.

Re: Kc vs. Kp

Posted: Sun Jan 12, 2020 12:15 am
by MaggieHan1L
Yes when we see gas we assume Kp and when we see aqueous we assume Kc.

Re: Kc vs. Kp

Posted: Sun Jan 12, 2020 10:00 am
by Jessica Li 4F
Kc applies to molar concentration (M) of gases or aqueous solutions, while Kp applies only to gases and is respective to their partial pressures.