K and Kc

[Emiliano Olivo Cauberghs]

Hi,
I was wondering if K and Kc are just two different ways to interpret the equilibrium constant or if they represent slightly different things?
Thanks in advance.

[Wesley Zhou 1F]

Yes, K is the general equilibrium "variable." Kc is equilibrium for concentration values.

[Tawny Vu 1A]

I believe they are the same! The one that is different is Q, which is the reactant quotient. Otherwise, K and Kc are both equilibrium constants im pretty sure

[Nicole Ton 3C]

Kc implies you are calculating using concentrations.

[Brooklyn Burgess 3L]

Kc specifies that it is the equilibrium constant for concentration since there can also be an equilibrium constant for pressure. Like Wesley said K is just the variable but it's the same.

[Bruce Ruff 2B]

They are the same thing. Kc just means that the values you are plugging in are concentration/molarity values. This is similar to Kp, except you would use pressure values.

[Abby Citro 2A]

K is the general equilibrium constant, while Kc has the connotation that you are working with concentrations.

[Parinita Jithendra 2A]

They are essentially the same thing as they both are equilibrium constants. However, Kc is more specific to concentrations as there is also Kp that is for partial pressures.