henry's law

[joonkimdds]

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Calculate the mass (in grams) of N2 dissolved in 1.795L of water at 368.7 torr, if the Henry's Law constant for N2 = 6.9000x10^-4M/atm.

I've never heard of Henry's law when I took GenChem class and I don't think it was covered in kaplan blue book(or was it?)
anyone know how to solve this problem? and was it covered in any of DAT preparation material?

 

[Dmitry Malayev]

I believe the DAT Destroyer covers Henry's Law. It's one of the Gas Laws, Gen Chem 1 i believe you should have learned it.

p=kc

where:
k = henry's constant
c = is the concentration of the solute in the solution
p = is the partial pressure of the solute above the solution

http://en.wikipedia.org/wiki/Henry's_law

 

[joonkimdds]

I believe the DAT Destroyer covers Henry's Law. It's one of the Gas Laws, Gen Chem 1 i believe you should have learned it.

p=kc

where:
k = henry's constant
c = is the concentration of the solute in the solution
p = is the partial pressure of the solute above the solution

http://en.wikipedia.org/wiki/Henry's_law

hm... ok.
k is 6.9000x10^-4M/atm.
c is what we are looking for
and how do I find p?