Question
The vapor pressure of pure water at 25 °C is 23.8 torr. Determine the vapor pressure (torr) of water
at 25 °C above a solution prepared by dissolving 35 g of urea (a nonvolatile, non-electrolyte, MW =
60.0 g/mol) in 75 g of water.
im not sure about the steps for problems like these...
at 25 °C above a solution prepared by dissolving 35 g of urea (a nonvolatile, non-electrolyte, MW =
60.0 g/mol) in 75 g of water.
im not sure about the steps for problems like these...
Answers
DrBob222
moles urea = 35 g/molar mass urea.
moles H2O = 75 g/molar mass H2O.
total moles = moles urea + moles H2O.
mole fraction H2O = moles H2O/total moles
P<sub>soln</sub> = X<sub>H2O</sub>*P<sup>o</sup><sub>normal</sub>
moles H2O = 75 g/molar mass H2O.
total moles = moles urea + moles H2O.
mole fraction H2O = moles H2O/total moles
P<sub>soln</sub> = X<sub>H2O</sub>*P<sup>o</sup><sub>normal</sub>