Solutions & Colligative Properties 1. The vapor pressure of water at 20°C is 17.5 torr. What is the vapor pressure of water over a solution containing 300. g C6H12O6 and 455 g of water at 20°C? Lab Section

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CHEM 103 - Homework 12
Name
Solutions & Colligative Properties
1. The vapor pressure of water at 20°C is 17.5 torr. What is the vapor pressure of water over a
solution containing 300. g C6H12O6 and 455 g of water at 20°C?
Lab Section
2. Calculate the freezing point of a solution made from 32.7 g of propane, C3H8, dissolved in
137.0 g of benzene, C6H6. The freezing point of benzene is 5.50°C and its Kf is 5.12°C/m.
3. Calculate the boiling point of a solution made from 227 g of MgCl2 dissolved in 700. g of
water. What is the boiling point of the solution? Kb = 0.512°C/m.
4. Calculate the concentration of nitrogen gas in a 1.00 L container exerting a partial pressure of
572 mm Hg at room temperature. Henry's law constant for nitrogen at 25°C is 6.8 x 10-4
mol/L'atm. (Solve using the information given and factor labelling)
W
Transcribed Image Text:CHEM 103 - Homework 12 Name Solutions & Colligative Properties 1. The vapor pressure of water at 20°C is 17.5 torr. What is the vapor pressure of water over a solution containing 300. g C6H12O6 and 455 g of water at 20°C? Lab Section 2. Calculate the freezing point of a solution made from 32.7 g of propane, C3H8, dissolved in 137.0 g of benzene, C6H6. The freezing point of benzene is 5.50°C and its Kf is 5.12°C/m. 3. Calculate the boiling point of a solution made from 227 g of MgCl2 dissolved in 700. g of water. What is the boiling point of the solution? Kb = 0.512°C/m. 4. Calculate the concentration of nitrogen gas in a 1.00 L container exerting a partial pressure of 572 mm Hg at room temperature. Henry's law constant for nitrogen at 25°C is 6.8 x 10-4 mol/L'atm. (Solve using the information given and factor labelling) W
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