O GASES, LIQUIDS, AND SOLIDS Calculating ideal solution composition after a distillation A solution of methylene chloride (CH,Cl,) and ethanol (CH CH,OH is boiling at 70.8 °C. A sample of the vapor above the solution is cooled until it condenses. This condensed sample is analyzed, and turns out to be 50.% methylene chloride by mass. Calculate the percent by mass of methylene chloride in the boiling solution. Here's some data you may need: vapor pressure at 70.8 °C normal density boiling point 40. C menylene chloride 2009. torr 1.3 mL ethanol 78. °C 568. torr 0.79 mL Be sure your answer has 2 significant digits. Note for advanced students: you may assume the solution and vapor above it are ideal. x10 Check Explanation Pr 2019 McGraw-Hill Education. All Rights Reserved. Terms of Use X II

O GASES, LIQUIDS, AND SOLIDS Calculating ideal solution composition after a distillation A solution of methylene chloride (CH,Cl,) and ethanol (CH CH,OH is boiling at 70.8 °C. A sample of the vapor above the solution is cooled until it condenses. This condensed sample is analyzed, and turns out to be 50.% methylene chloride by mass. Calculate the percent by mass of methylene chloride in the boiling solution. Here's some data you may need: vapor pressure at 70.8 °C normal density boiling point 40. C menylene chloride 2009. torr 1.3 mL ethanol 78. °C 568. torr 0.79 mL Be sure your answer has 2 significant digits. Note for advanced students: you may assume the solution and vapor above it are ideal. x10 Check Explanation Pr 2019 McGraw-Hill Education. All Rights Reserved. Terms of Use X II

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter11: Properties Of Solutions

Section: Chapter Questions

Problem 6RQ: In terms of Raoults law, distinguish between an ideal liquid-liquid solution and a nonideal...

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You make 20.0 g of a sucrose (C12H22O11) and NaCl mixture and dissolve it in 1.00 kg water. The freezing point of this solution is found to be 0.426C. Assuming ideal behavior, calculate the mass percent composition of the original mixture, and the mole fraction of sucrose in the original mixture.
In terms of Raoults law, distinguish between an ideal liquid-liquid solution and a nonideal liquid-liquid solution. lf a solution is ideal, what is true about Hsoln, T for the solution formation, and the interactive forces within the pure solute and pure solvent as compared to the interactive forces within the solution? Give an example of an ideal solution. Answer the previous two questions for solutions that exhibit either negative or positive deviations from Raoults law.
A gaseous solute dissolves in water. The solution process has H=15 kJ. Its solubility at 22C and 6.00 atm is 0.0300 M. Would you expect the solubility to be greater or less at (a) 22C and 1 atm? (a) 18C and 6 atm? (a) 15C and 10 atm? (a) 35C and 3 atm?
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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?