4. The vapor pressure of pure water and pure ethanol at 25 \deg C are 24 Torr and 44 Torr, respectively. Suppose you have a water - ethanol mixture and the total vapor pressure is 31.2 Torr. Sucrose, C12H22011, is a non-volatile solute that will not contribute to the total vapor pressure. When 0.03 moles of sucrose is added to the water - ethanol mixture, the vapor pressure drops to 29.8 Torr. How many moles of water are present in the solution?

4. The vapor pressure of pure water and pure ethanol at 25 \deg C are 24 Torr and 44 Torr, respectively. Suppose you have a water - ethanol mixture and the total vapor pressure is 31.2 Torr. Sucrose, C12H22011, is a non-volatile solute that will not contribute to the total vapor pressure. When 0.03 moles of sucrose is added to the water - ethanol mixture, the vapor pressure drops to 29.8 Torr. How many moles of water are present in the solution?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter11: Properties Of Solutions

Section: Chapter Questions

Problem 70E: The vapor pressures of several solutions of water-propanol (CH3CH2CH2OH) were determined at various...

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The vapor pressures of several solutions of water-propanol (CH3CH2CH2OH) were determined at various compositions, with the following data collected at 45C: H2O Vapor pressure(torr) 0 74.0 0.15 77.3 0.37 80.2 0.54 81.6 0.69 80.6 0.83 78.2 1.00 71.9 a. Are solutions of water and propanol ideal? Explain. b. Predict the sign of Hsoln for water-propanol solutions. c. Are the interactive forces between propanol and water molecules weaker than, stronger than, or equal to the interactive forces between the pure substances? Explain. d. Which of the solutions in the data would have the lowest normal boiling point?
The osmotic pressure of a solution containing 7.0 g of insulin per liter is 23 torr at 25 C. What is the molar mass of insulin?
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