Question
The vapor pressure of water is 23.8 torr. at 25 degrees C. Determine the mass of glucose (molar mass 180g/mol) needed to add to 500g of water to change the vapor pressure to 23.1 torr.
Answers
DrBob222
P<sub>soln</sub> = X<sub>H2O</sub>*P<sup>o</sup><sub>H2O</sub>
Solve for X<sub>H2O</sub>
X<sub>H2O</sub> = (moles H2O/total moles)
Plug in X, n for H2O and n for glucose and solve for n glucose, then
grams glucose = moles x molar mass.
Post your work if you get stuck.
Solve for X<sub>H2O</sub>
X<sub>H2O</sub> = (moles H2O/total moles)
Plug in X, n for H2O and n for glucose and solve for n glucose, then
grams glucose = moles x molar mass.
Post your work if you get stuck.
Anonymous
555.6