posted by Jesse .
An aqueous solution has a vapor pressure of 81.1 at 50 . The vapor pressure of pure water at this temperature is 92.6. What is the concentration of in mass percent?
What is the concn of WHAT? in mass percent?
Psoln = Xsolvent*Psolvent
81.1 = Xsolvent*(92.6)
Solve for X which is the mole fraction of the solvent,
1-mole fraction solvent = mole fraction solute.
Convert mole fraction solute to mass percent.