Asked by Anonymous
A solution is prepared by adding 30.00 g of lactose (milk sugar) to 110.0 g of water at 55 °C. The vapor pressure of pure water at 55 °C is 118.0 torr. The MW of lactose is 342.3 g/mol. What is the partial pressure of water above the
solution?
solution?
Answers
Answered by
DrBob222
moles lactose = grams/molar mass
moles H2O = moles/molar mass
mole fraction H2O = moles H2O/total moles.
P<sub>soln</sub> = X<sub>H2O</sub>*P<sup>o</sup><sub>H2O</sub>
moles H2O = moles/molar mass
mole fraction H2O = moles H2O/total moles.
P<sub>soln</sub> = X<sub>H2O</sub>*P<sup>o</sup><sub>H2O</sub>
Answered by
Anonymous
92.7
Answered by
chantal
2.216
Answered by
A Person
The answer is 116.3 if you don't feel like plugging the numbers in.
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