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9. Solutions

Boiling Point Elevation

9. Solutions

Boiling Point Elevation

Multiple Choice
An ethylene glycol solution contains 25.2 g of ethylene glycol (C₂H₆O₂) in 99.5 mL of water. Determine the change in boiling point. Assume a density of 1.00 g/mL for water.
Multiple Choice
Pure water boils at 100ºC. What is the new boiling point of water after the addition of 13.12 g aluminum chloride, AlCl₃, to 615 g water?
Multiple Choice
What is the molality of glucose in an aqueous solution if the boiling point of the solution is 103.15ºC?
Multiple Choice
Carbon dioxide is dissolved in 722 mL of benzene with a density of 1.59 g/mL. What mass of carbon dioxide would you add to make the boiling point of the solution 104.7ºC?
Open Question
When 1.0 mol of HF is dissolved in 1.0 kg of water, the boiling point of the resulting solution is 100.5 °C. Is HF a strong or weak electrolyte? Explain.
Open Question
The diagram to the right shows plots of vapor pressure versus temperature for a solvent and a solution. What is the approximate concentration of the solution in mol/kg, if 1 mol of solute particles raises the boiling point of 1 kg of solvent by 3.63 °C?