## Calculating partial pressure using concentration

$PV=nRT$

Ariana 4C
Posts: 4
Joined: Fri Sep 26, 2014 2:02 pm

### Calculating partial pressure using concentration

How do you find the partial pressure of reactants and products when you are given Kp and an initial molarity?
Thank you :~)
Last edited by Ariana 4C on Tue Dec 02, 2014 1:18 pm, edited 1 time in total.

Eduardo Torres 3G
Posts: 13
Joined: Fri Sep 26, 2014 2:02 pm

### Re: Calculating partial pressure using concentration

Normally for these kinds of problems you are also given temperature. With this information PV=nRT can be readjusted to P=cRT (since concentration=n/V). Now you can find the partial pressure of that molecule and use the formula for Kp to find the partial pressure of another reactant or product. I hope this helps.

EJunChang1C
Posts: 11
Joined: Fri Sep 26, 2014 2:02 pm

### Re: Calculating partial pressure using concentration

You use the conversion formula Kp=Kc(RT)^delta n where R is the universal gas constant 0.08206 with its unit of (L*atm)/ (mol*K).