## Equilibrium Constant

Any general non-science questions (software questions/problems, etc.,) and class announcements.

Xin Huang 3E
Posts: 40
Joined: Wed Sep 21, 2016 2:57 pm

### Equilibrium Constant

What should we do if there is a mix of gas and aqueous? do we use Ec or Ep or something else?

kara_kremer_2N
Posts: 20
Joined: Fri Jul 15, 2016 3:00 am

### Re: Equilibrium Constant

Use concentrations, but make sure all are converted into concentrations.

Xin Huang 3E
Posts: 40
Joined: Wed Sep 21, 2016 2:57 pm

### Re: Equilibrium Constant

How do we convert the pressure to concentration?

Annalia_Ferrer_1F
Posts: 10
Joined: Wed Sep 21, 2016 2:59 pm

### Re: Equilibrium Constant

The pressure of a gas (partial pressure) is proportional to concentration.
If you use the Ideal Gas Law, pv=nrt, you can see that you can manipulate the formula to give you concentration using pressure. Your set up should look like this:
pv=nrt
pv/rt= n
p/rt=n/v
Notice that n/v is just concentration ( in M )
p/rt= concentration

Hope this helps!