Thursday
August 28, 2014

Homework Help: Chemistry

Posted by Tracy on Saturday, February 3, 2007 at 11:50pm.

Heyy, okay I have this question about chemistry and its driving me nuts. It feels like I am so close but am just missing something. The question is:

A vessel of 6.84 L in volume contains 3.61 L of pure water at 25C. A partial pressure of 3.67 atm of CO2 is quickly injected into the space above the water. Calculate the partial pressure of carbon dioxide remaining once the solution has become saturated with the gas. Henry's constant for CO2 at this temperature is 0.0350 M atm-1

Okay so I know basically this...we dicussed with some other people and rearrganed equations and basically got this:
(mol initial - mol final)/V = concentration x pressure.

so the initial moles you get using PV=NRT, so N=PV/RT and same for moles final (diff volumes used of course) but I think thats where I'm messing up. Because after that you divide by a volume, then by the concentration. But I think I'm messing up what volumes go where. I know what the answer ius supposed to be and I cant get it for the life of me. I'm thinking that for inital moles the volume would be 6.84 cause thats the whole thing. And then I'm thinking for final moles it would be 3.61 cause thats where the liquid is. But I dont know what I would divde by...the leftover 3.23? anyways I've tried many combinations and I cant get it. ANy help would be greatly apprecaited. I could be totally on the wrong track. Thanks

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chemistry - Heyy, okay I have this question about chemistry and its driving me ...
Maybe you know this one.. - Heyy, I posted this before but it kinda got pushed ...
English - I have a question about quoting. If I have a sentence like: Something ...
Question about the board - I am looking at many questions that just have 2 or 3 ...
Chemistry - Oops, I accidently posted this as an answer to my previous question...
chemistry - continued from before.... the question was what are three chemical ...
Biology - I had a Bio lab about gel electrophoresis and PCR. for each lab, we ...
PLEASE - PLEASE SOMEONE RESPOND TO MY QUESTION: Physics (12)! THIS QUESTION IS ...
Chemistry - Heyy, okay I have this chemistry assingmnet and its on kinetics, and...
chemistry help - our teacher said on our final chemistry lab test there will be ...

Search
Members