## Algebra

$PV=nRT$

Ricky Ma DIS 4E
Posts: 72
Joined: Fri Sep 28, 2018 12:27 am

### Algebra

Can someone explain to me how P=(Conc)RT becomes Conc=P/RT? And for clarification P stand for partial pressure right?

Tarika Gujral 1K
Posts: 62
Joined: Fri Sep 28, 2018 12:27 am

### Re: Algebra

Concentration is n (mol) / V (L)

Given the ideal gas law: PV = nRT
We write P = (n/V)RT
Thus P = (Conc)RT

Then to determine concentration, we divide P by RT
And get P/RT = Conc

ThomasLai1D
Posts: 61
Joined: Fri Sep 28, 2018 12:17 am

### Re: Algebra

By dividing P=(conc)RT by RT, the resulting equation would be P/RT=conc. I do not think P is necessarily restricted to partial pressures, just that it represents pressure in the formula.

Cynthia Aragon 1B
Posts: 47
Joined: Mon Apr 09, 2018 1:38 pm

### Re: Algebra

For a gas we use its partial pressure (P).

To convert between concentration and pressure you use the ideal gas law: PV= nRT

To ultimately get concentration, first divide by "V" on both sides of the equation to get P=(n/V) RT

n/V stands for mole/V or mol/L

Then P= conc (RT)

To get concentration by itself divide by (RT) on both sides of the equation to get P/RT = concentration

Brianna Brockman 1F
Posts: 60
Joined: Fri Sep 28, 2018 12:23 am

### Re: Algebra

P=(conc)RT becomes Conc=P/RT like this:

Becasue you want to get Conc alone, you divide both sides by RT. This makes RT cancel out on the side of concentration.

now you have Conc=P/RT