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34 solutions

Boiling Point Elevation

Q. 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 depression constant of 2.53°C/m. A) 82.3°C B) 2.2°C C) 80.4°C D) 82.6°C E) 2.5°C

Solved • Jul 15, 2019

Boiling Point Elevation

Q. A glucose solution contains 54.8g of glucose (C6H12O6) in 495 g of water. Compute the freezing point and boiling point of the solution. (Assume density of 1.00g/mL for water.)

Solved • Dec 4, 2019

Boiling Point Elevation

Q. A solution of water (Kb=0.512 ∘C/m) and glucose boils at 101.56 ∘C. What is the molal concentration of glucose in this solution? Assume that the boiling point of pure water is 100.00 ∘C. Express your answer to three significant figures and include the appropriate units.

Solved • Nov 12, 2019

Boiling Point Elevation

Q. At what temperature would a 1.50 m NaCl solution freeze, given that the van't Hoff factor for NaCl is 1.9? Kf for water is 1.86 ∘C/m . Express your answer with the appropriate units

Solved • Nov 12, 2019

Boiling Point Elevation

Q. Paradichlorobenzene, C6H4Cl2, is a component of mothballs. A solution of 2.00 g in 22.5 g of cyclohexane boils at 82.39 ∘C. The boiling point of pure cyclohexane is 80.70 ∘C. Calculate Kb for cyclohexane. Express the constant numerically in degrees Celsius per molal.

Solved • Nov 12, 2019

Boiling Point Elevation

Q. A 1.35 m aqueous solution of compound X had a boiling point of 102.8°C. Which one of the following could be compound X? The boiling point elevation constant for water is 0.52°C/m. Group of answer choices CaCl2 CH3CH2OH Na3PO4 C6H12O6 KCl

Solved • Nov 12, 2019

Boiling Point Elevation

Q. Determine the change in boiling point for 373.9 g of carbon disulfide (Kb = 2.34℃ kg/mol) if 35.0 g of a nonvolatile, nonionizing compound is dissolved in it. The molar mass of the compound is 70.0 g/mol and the boiling point of the pure carbon disulfide is 46.2℃. a. 1.75 ℃ b. 26.4℃ c. 0.219℃ d. 6.26℃ e. 3.13℃

Solved • Oct 25, 2019