Explain2Homework Answers
vapor pressure of solution = moles fraction of solvent x vapor pressure of pure solvent
moles of ethanol = 120.7/46.068 = 2.62 mols
moles of glycerin = 73.6/92.094 = 0.80 mols
Total moles = 3.42 mols
moles fraction of ethanol = 2.62/3.42 = 0.766
vapor pressure of pure ethanol = 169.3/0.766 = 221.0 torr
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