What is K

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

What is K

Postby Ellis Song 4I » Tue Jan 14, 2020 11:39 pm

What exactly is just K compared to Kc and Kp

Justin Seok 2A
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Re: What is K

Postby Justin Seok 2A » Tue Jan 14, 2020 11:43 pm

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
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Re: What is K

Postby Eunice Nguyen 4I » Wed Jan 15, 2020 2:45 am

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
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Re: What is K

Postby Kate Swertfager » Wed Jan 15, 2020 8:15 am

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
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Re: What is K

Postby Jaci Glassick 2G » Wed Jan 15, 2020 9:09 am

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
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Re: What is K

Postby Jasmine Vallarta 2L » Wed Jan 15, 2020 9:18 am

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

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Joined: Fri Aug 09, 2019 12:17 am

Re: What is K

Postby preyasikumar_2L » Wed Jan 15, 2020 11:41 am

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.

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