Homework Help: college chemistry

Posted by renee on Sunday, February 26, 2012 at 9:22pm.

A solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC (assuming ideal behavior) is:

college chemistry - DrBob222, Sunday, February 26, 2012 at 11:06pm
Before I forget it, did you get the problem of toluene and benzene, in which the problem asked for X of one of them IN THE SOLUTION, worked? I can do that one if you post it.

moles ether = ?
moles EtOH = ?
Xether = nether/total mols.
XEtOH = nEtOH/total mols.

pether = Xether*P^o_ether
pEtOH = XEtOH*P^o_EtOH
Then total vapor pressure = pethr + pEtOH.

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