## Partial Pressure or Concentration

Anna Makridis_L1
Posts: 13
Joined: Fri Jul 01, 2016 3:00 am

### Partial Pressure or Concentration

For some of the homework problems it just said to solve for k with a certain chemical reaction. If it doesn't specify kp or kc which one should we use? For some of them it switched back and forth between different parts of one question.

cara_Budzinski_3D
Posts: 22
Joined: Sat Jul 09, 2016 3:00 am

### Re: Partial Pressure or Concentration

You solve for Kp when dealing with a gaseous reaction. You solve for Kc when dealing with any other reaction (but only include aqueous components in your K expression). Hope this helps!

Kareem
Posts: 18
Joined: Wed Sep 21, 2016 3:00 pm

### Re: Partial Pressure or Concentration

Sometimes you will be dealing with a reaction that has both Kp and Kc. Make sure that you understand what the question is asking. If its asking for the molar concentration, that use Kc, but if its asking about pressure then use Kp. Remember that aqueous solutions can produce both aqueous, gaseous, and solid products. Simply because you have a gas in there does not mean that they are asking for pressure. Gasses also have concentrations, which is simply n/V. So look at what the question is asking for, and remember that you can convert from pressure to concentration if you need to using P=concentration(RxT)

Anna Makridis_L1
Posts: 13
Joined: Fri Jul 01, 2016 3:00 am

Thank you!