Asked by yoo

A solution contains 5.00 g of urea, CO(NH2)2 (a nonvolatile solute) and 0.100 kg of water. If the vapor
pressure of pure water at 25 °C is 23.7 torr, what is the vapor pressure of the solution assuming ideal
behavior?

Answers

Answered by DrBob222
How many moles urea? That's moles = g/molar mass.
moles urea = 5.00/molar mass urea = ?
moles H2O = 1000 g/molar mass H2O = ?
Total mols = mols urea + moles water = ?
moled fraction water X<sub>H2O</sub> = ?
P<sub>solution</sub> = X<sub>H2O</sub>*P<sup>o</sup><sub>H2O</sub>
Substitute and solve. Post your work if you get stuck.
Answered by DrBob222
oops. Left out a step.
To get XH2O it is mols H2O/total moles = ?
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