## What is K

Ellis Song 4I
Posts: 102
Joined: Thu Jul 11, 2019 12:17 am

### What is K

What exactly is just K compared to Kc and Kp

Justin Seok 2A
Posts: 104
Joined: Sat Aug 24, 2019 12:15 am

### Re: What is K

K is pretty much a more ambiguous term than either Kc or Kp. Often times when K is used, it should be pretty apparent whether Kc or Kp should be used, like with Kp when you are given partial pressures or Kc when there are no gas-phase reactants or products.

Eunice Nguyen 4I
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

### Re: What is K

K is just equilibrium constant (also referred to as Keq). Kc refers to when you're using aqueous reactants/products, whereas you'd use Kp for gaseous reactions.

Kate Swertfager
Posts: 50
Joined: Wed Sep 18, 2019 12:17 am

### Re: What is K

I think of K as the blanket term for the equilibrium constant. Then more specifically we have Kc, Kp and Kw which are all slightly different but refer to the equilibrium constant as well.

Jaci Glassick 2G
Posts: 104
Joined: Sat Jul 20, 2019 12:16 am

### Re: What is K

K is the equilibrium constants. Kc, Kp, Kw are just different "types"/"ways" of finding K. With Kc, you use concentrations of the products and reactants (Kc=P/R). With Kp, you use partial pressures (Kp=Pp/Pr).

Jasmine Vallarta 2L
Posts: 102
Joined: Sat Aug 17, 2019 12:18 am

### Re: What is K

K can represent both Kc and Kp. Kc is specific to a species' concentration and Kp is for a gas' partial pressure.

preyasikumar_2L
Posts: 101
Joined: Fri Aug 09, 2019 12:17 am

### Re: What is K

I'm pretty sure Kc, Kp, Kw, Keq, Ka, Kb, etc are all different ways to clarify K, the equilibrium constant, by what is being used to calculate that value.
Kc is the equilibrium constant that is calculated using the concentrations of aqueous substances or gases of a system at equilibrium.
Kp is the equilibrium constant that is calculated using the partial pressures of gases of a system at equilibrium.
Kw is the equilibrium constant of pure water (in the reaction where H2O(l) <--> H3O+(aq) + OH-(aq))
Keq is another way to say K, the equilibrium constant.
(I think, please correct me if I'm wrong) Ka and Kb are the equilibrium constants of systems that involve the creation/dissociation(?) of acids and bases respectively.