Multiple Choice
Using Raoult's Law, calculate the vapor pressure of water at 50.0°C if the pure vapor pressure of water at this temperature is 12.3 kPa and a non-volatile solute is added to form a solution with a mole fraction of water of 0.8.
14. Solutions
Vapor Pressure Lowering (Raoult's Law)
Back14. Solutions
Vapor Pressure Lowering (Raoult's Law)
- Multiple ChoiceA 0.200 m solution of which of the following solutes in water will have the lowest vapor pressure?
- Multiple ChoiceUsing Raoult's Law, calculate the vapor pressure of SiCl4 at 33.5 °C given that its vapor pressure is 100 mm Hg at 5.4 °C and ΔHvap = 30.2 kJ/mol.
- Multiple ChoiceA solution is prepared by dissolving 40.0 g of sucrose, C12H22O11, in 250. g of water at 25°C. What is the vapor pressure of the solution if the vapor pressure of pure water at 25°C is 23.76 mm Hg?
- Multiple Choice
Determine the vapor pressure lowering associated with 1.32 m C6H12O6 solution (MW:180.156 g/mol) at 25°C. The vapor pressure of pure water at 25°C is 23.8 torr.
1views - Multiple Choice
How many grams of glucose, C6H12O6, must be added to 515.0 g of water to give a solution with a vapor pressure of 13.2 torr at 20.0ºC? The vapor pressure of pure water at 20.0ºC is 17.5 torr.
1views - Multiple ChoiceA solution containing ethylene glycol and water has a vapor pressure of 7.88 torr at 10°C. Pure water has a vapor pressure of 9.21 torr at 10°C. What is the mole fraction of ethylene glycol in the solution?
- Multiple ChoiceUsing Raoult's Law and the Clausius-Clapeyron equation, what is the vapor pressure of SiCl4 in mmHg at 31.0 °C, given that its vapor pressure is 100 mmHg at 5.4 °C and ΔHvap is 30.2 kJ/mol?
- Multiple ChoiceWhile mercury is very useful in barometers, mercury vapor is toxic. Given that mercury has a ΔHvap of 59.11 kJ/mol and its normal boiling point is 356.7°C, calculate the vapor pressure in mmHg at room temperature, 25°C.
- Multiple ChoiceWhat would be the vapor pressure at 25.0 °C of a solution of 5.00 g of glucose (C6H12O6) in 100.0 g of ethanol (C2H5OH)? Pure ethanol has a vapor pressure of 54.68 mmHg at 25 °C.1views