posted by Sara .
A solution of NaCl in water has a vapor pressure of 18.1 torr at 25 degrees C. What is the mole fraction of NaCl solute particles in this solution? What is vapor pressure at 45 degrees C? Vapor pressure of pure water is 23.8 torr at 25C and 71.9 torr at 45C, assume ions are Na+ and Cl-.
This is really two problems in one but it's the same principle as the CH2Cl2 and CH2Br2 EXCEPT it's a little simpler since NaCl is not volatile. It's a non-volatile solute BUT it ionizes into two particles instead of one. You give it a whirl and post your calculations if you come up dry.
No luck with me too. I'm drawing a blank since they don't give you moles or grams to work with. Thank you for all your help!!!