K

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taline_n
Posts: 64
Joined: Fri Sep 28, 2018 12:17 am

K

Postby taline_n » Wed Jan 09, 2019 9:24 am

When asked to write out the equilibrium constant for an equation, is Kp or Kc preferred?

Kelsey Warren 1I
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Re: K

Postby Kelsey Warren 1I » Wed Jan 09, 2019 9:37 am

I'm pretty sure that when you're dealing with gases, you use partial pressures to calculate K, so you'd use Kp. When you're using aqueous compounds, etc., so you're plugging in concentrations into your calculation for K, you'd use Kc.

Courtney McHargue 1I
Posts: 56
Joined: Fri Sep 28, 2018 12:17 am

Re: K

Postby Courtney McHargue 1I » Wed Jan 09, 2019 10:18 am

If you're dealing with solutions that have a given concentration, then you use Kc, but if you're dealing with gases and partial pressures, you use Kp.

Hannah Pham 1D
Posts: 62
Joined: Fri Sep 28, 2018 12:19 am

Re: K

Postby Hannah Pham 1D » Wed Jan 09, 2019 10:25 am

Kc is used when the units of the equilibrium concentrations are moles per liter. Kp is used when using partial pressure. It’s basically the same thing but with different units.

JT Wechsler 2B
Posts: 62
Joined: Fri Sep 28, 2018 12:16 am

Re: K

Postby JT Wechsler 2B » Wed Jan 09, 2019 10:45 am

You will use Kc when asked about concentrations (molarity) and Kp when asked about the partial pressures of gases.


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