A solution contains 56.6  g of ethanol, C2H5OH, and155 g of water at 25oC. a) What is the mole fraction of ethanol in this solution? b) What is the mole fraction of water in this solution? c) If the vapour pressure of pure water at 25oC is 0.0313atm and the vapour pressure of pure ethanol at 25oC is 0.07725atm, determine the vapour pressure of the solution at this temperature.

Chemistry: The Molecular Science
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Chapter13: The Chemistry Of Solutes And Solutions
Section13.7: Colligative Properties Of Solutions
Problem 13.10PSP: The vapor pressure of an aqueous solution of urea. CH4N2O, is 291.2 mmHg at a measured temperature....
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A solution contains 56.6  g of ethanol, C2H5OH, and155 g of water at 25oC.

a) What is the mole fraction of ethanol in this solution?

b) What is the mole fraction of water in this solution?

c) If the vapour pressure of pure water at 25oC is 0.0313atm and the vapour pressure of pure ethanol at 25oC is 0.07725atm, determine the vapour pressure of the solution at this temperature.

 

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