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14. Solutions

Boiling Point Elevation

14. Solutions

Boiling Point Elevation

Multiple Choice
At an elevation of 1.45×10^4 ft, what is the approximate boiling point of water?
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Open Question
Determine the boiling point of a solution that contains 78.8 g of naphthalene (C₁₀H₈, molar mass = 128.16 g/mol) dissolved in 722 ml of benzene (d = 0.877 g/ml). Pure benzene has a boiling point of 80.1°C and a boiling point elevation constant of 2.53°C/m.
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Multiple Choice
A solution of water (Kb=0.512 °C/m) and glucose boils at 103.56 °C. What is the molal concentration of glucose in this solution? Assume that the boiling point of pure water is 100.00 °C.
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Open Question
A solution of toluene (C₇H₈) in 301 g of cyclohexane (C₆H₁₂) has a boiling point of 90.30°C. what quantity in moles of toluene are in the solution? (for cyclohexane k_b = 2.92°C/m, normal boiling point, T_b = 80.90°C)
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Multiple Choice
100.0 g of urea (CO(NH2)2) is dissolved in 550.0 g of liquid chloroform. Given that urea is a covalent compound with a molar mass of 60.07 g/mol and the boiling point elevation constant (Kb) for chloroform is 3.63 °C/m, what is the boiling point of the solution if the normal boiling point of chloroform is 61.2 °C?
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Multiple Choice
Pure water boils at 100°C. What is the new boiling point of water after the addition of 13.12 g aluminum chloride, AlCl₃, to 615 g water?
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