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Naproxen (C14H1403) is a commercially important anti-inflammatory agent that can be isolated from the thyroid gland. A solution of 1.837 g of naproxen in 27.0 g of benzene (C6H6) is prepared at 20°C. The density of benzene at this temperature is 0.8787 g/mL. Assume that naproxen remains intact upon dissolution and the density of the solution equals the density of pure benzene. Use the following data: MM naproxen= 230 g/mol ; MM benzene= 78 g/mol; R=0.08206 L-atm/ mol-K; For benzene : kb= 2.53°C kg/mol ; kf= 5.12°C kg/mol; Boiling point= 80.1°C; Freezing point= 5.5°C 1. What is the molality of the solution? A. 0.30 m C. 0.24 m B. 0.28 m D. 0.20 m 2. What is the boiling point of the solution? A. 80.71°C C. 80.81°C B. 80.86°C D. 80.1°C 3. What is the freezing point of the solution? A. 4.48°C C. 4.27°C B. 4.07°C D. 3.96°C

Naproxen (C14H1403) is a commercially important anti-inflammatory agent that can be isolated from the thyroid gland. A solution of 1.837 g of naproxen in 27.0 g of benzene (C6H6) is prepared at 20°C. The density of benzene at this temperature is 0.8787 g/mL. Assume that naproxen remains intact upon dissolution and the density of the solution equals the density of pure benzene. Use the following data: MM naproxen= 230 g/mol ; MM benzene= 78 g/mol; R=0.08206 L-atm/ mol-K; For benzene : kb= 2.53°C kg/mol ; kf= 5.12°C kg/mol; Boiling point= 80.1°C; Freezing point= 5.5°C 1. What is the molality of the solution? A. 0.30 m C. 0.24 m B. 0.28 m D. 0.20 m 2. What is the boiling point of the solution? A. 80.71°C C. 80.81°C B. 80.86°C D. 80.1°C 3. What is the freezing point of the solution? A. 4.48°C C. 4.27°C B. 4.07°C D. 3.96°C

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter13: Solutions And Their Behavior
Section: Chapter Questions
Problem 107SCQ
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Naproxen (C14H1403) is a commercially important anti-inflammatory agent that can be isolated from the thyroid gland. A solution of 1.837 g of naproxen in 27.0 g of benzene (C6H6) is prepared at 20°C. The density of benzene at this temperature is 0.8787 g/mL. Assume that naproxen remains intact upon dissolution and the density of the solution equals the density of pure benzene. Use the following data: MM naproxen= 230 g/mol ; MM benzene= 78 g/mol; R=0.08206 L-atm/ mol-K; For benzene : kb= 2.53°C kg/mol ; kf= 5.12°C kg/mol; Boiling point= 80.1°C ; Freezing point= 5.5°C 1. What is the molality of the solution? C. 0.24 m D. 0.20 m A. 0.30 m B. 0.28 m 2. What is the boiling point of the solution? A. 80.71°C C. 80.81°C B. 80.86°C D. 80.1°C 3. What is the freezing point of the solution? A. 4.48°C С. 4.27°C В. 4.07°C 4. What is the molarity of the solution? D. 3.96°C A. 0.30 M C. 0.24 M В. 0.28 М D. 0.20 M 5. What is the osmotic pressure of the solution? A. 0.49 M C. 5.77 M В. 7.22 М 6. What is the mole fraction of naproxen in the solution? D. 0.4 M A. 0.98 C. 0.07 В. О.33 7. What is the mass percent of naproxen in the solution? D. 0.02 A. 6.37% C. 74.68% В. 93.63% D. 25.32%
Transcribed Image Text:Naproxen (C14H1403) is a commercially important anti-inflammatory agent that can be isolated from the thyroid gland. A solution of 1.837 g of naproxen in 27.0 g of benzene (C6H6) is prepared at 20°C. The density of benzene at this temperature is 0.8787 g/mL. Assume that naproxen remains intact upon dissolution and the density of the solution equals the density of pure benzene. Use the following data: MM naproxen= 230 g/mol ; MM benzene= 78 g/mol; R=0.08206 L-atm/ mol-K; For benzene : kb= 2.53°C kg/mol ; kf= 5.12°C kg/mol; Boiling point= 80.1°C ; Freezing point= 5.5°C 1. What is the molality of the solution? C. 0.24 m D. 0.20 m A. 0.30 m B. 0.28 m 2. What is the boiling point of the solution? A. 80.71°C C. 80.81°C B. 80.86°C D. 80.1°C 3. What is the freezing point of the solution? A. 4.48°C С. 4.27°C В. 4.07°C 4. What is the molarity of the solution? D. 3.96°C A. 0.30 M C. 0.24 M В. 0.28 М D. 0.20 M 5. What is the osmotic pressure of the solution? A. 0.49 M C. 5.77 M В. 7.22 М 6. What is the mole fraction of naproxen in the solution? D. 0.4 M A. 0.98 C. 0.07 В. О.33 7. What is the mass percent of naproxen in the solution? D. 0.02 A. 6.37% C. 74.68% В. 93.63% D. 25.32%
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