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4- Two organic solvents (A and B) form an ideal solution when they mixed at 25 °C. The vapor pressures of A and B solvents at 25 °C are 500 and 180 mmHg, respectively. By mixing 30 mL of A (d-0.64 g/mL) with 48 mL B (d-0.67 g/mL), an ideal solution is prepared. a- What is the vapor pressure of resulting ideal solution? b- What is the composition by mole fraction of A in the vapor that is in equilibrium with this solution? (Mw of A= 72.15 g/mol: Mw of B=86.17 g/mol)

4- Two organic solvents (A and B) form an ideal solution when they mixed at 25 °C. The vapor pressures of A and B solvents at 25 °C are 500 and 180 mmHg, respectively. By mixing 30 mL of A (d-0.64 g/mL) with 48 mL B (d-0.67 g/mL), an ideal solution is prepared. a- What is the vapor pressure of resulting ideal solution? b- What is the composition by mole fraction of A in the vapor that is in equilibrium with this solution? (Mw of A= 72.15 g/mol: Mw of B=86.17 g/mol)

Chemistry by OpenStax (2015-05-04)
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter11: Solutions And Colloids
Section: Chapter Questions
Problem 65E: The vapor pressure of methanol, CH3OH, is 94 torr at 20 C. The vapor pressure of ethanol, C2H5OH, is...
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Question 4
Paragraf Stiller 4- Two organic solvents (A and B) form an ideal solution when they mixed at 25 °C. The vapor pressures of A and B solvents at 25 °C are 500 and 180 mmHg, respectively. By mixing 30 mL of A (d-0.64 g/mL) with 48 mL B (d=0.67 g/mL), an ideal solution is prepared. a- What is the vapor pressure of resulting ideal solution? b- What is the composition by mole fraction of A in the vapor that is in equilibrium with this solution? (Mw of A= 72.15 g/mol; Mw of B= 86.17 g/mol) 5- A chemist is given a nonelectrolyte white powder for analysis. 38.7 g of this substance is dissolved in 100.0 g of water. It is determined that the resulting solution freezes at -4.0°C Additionally, the elemental composition of the substance is identified and found to be 40.0% C6 704 H ad 53.3 0,0hma: Find themolecular formula of this unknown white powvder
Transcribed Image Text:Paragraf Stiller 4- Two organic solvents (A and B) form an ideal solution when they mixed at 25 °C. The vapor pressures of A and B solvents at 25 °C are 500 and 180 mmHg, respectively. By mixing 30 mL of A (d-0.64 g/mL) with 48 mL B (d=0.67 g/mL), an ideal solution is prepared. a- What is the vapor pressure of resulting ideal solution? b- What is the composition by mole fraction of A in the vapor that is in equilibrium with this solution? (Mw of A= 72.15 g/mol; Mw of B= 86.17 g/mol) 5- A chemist is given a nonelectrolyte white powder for analysis. 38.7 g of this substance is dissolved in 100.0 g of water. It is determined that the resulting solution freezes at -4.0°C Additionally, the elemental composition of the substance is identified and found to be 40.0% C6 704 H ad 53.3 0,0hma: Find themolecular formula of this unknown white powvder
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