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Boiling Point Elevation

#### Q. If the 3.90 m solution from Part A boils at 103.45 °C, what is the actual value of the van't Hoff factor, i? The boiling point of pure water is 100.00 °C and Kb is equal to 0.512 °C/m. Express your answer numerically

Solved • Feb 7, 2020

Boiling Point Elevation

#### Q. The boiling point of water is 100.0°C at 1 atmosphere. How many grams of iron(III) chloride (162.2 g/mol), must be dissolved in 263.0 grams of water to raise the boiling point by 0.300 °C? Refer to the table for the necessary boiling or freezing point constant. ____ g iron(III) chloride

Solved • Feb 4, 2020

Boiling Point Elevation

#### Q. The boiling point diethyl ether, CH3CH2OCH2CH3, is 34.500 °C at 1 atmosphere, Kb(diethyl ether) = 2.02 °C/m In a laboratory experiment, students synthesized a new compound and found that when 13.09 grams of the compound were dissolved in 269.6 grams of diethyl ether, the solution began to boil at 34.610 °C. The compound was also found to be nonvolatile and non-electrolyte. What is the molecular weight they determined for this compound?

Solved • Feb 4, 2020

Boiling Point Elevation

#### Q. The boiling point diethyl ether, CH3CH2OCH2CH3, is 34.500 °C at 1 atmosphere, Kb(diethyl ether) = 2.02 °C/m In a laboratory experiment, students synthesized a new compound and found that when 14.89 grams of the compound were dissolved in 274.2 grams diethyl ether, the solution began to boil at 34.880 °C. The compound was also found to be nonvolatile and non-electrolyte. What is the molecular weight they determined for this compound?

Solved • Feb 4, 2020

Boiling Point Elevation

#### Q. The boiling point of benzene, C6H6, is 80.100 °C at 1 atmosphere. Kb(benzene) = 2.53 °C/m In a laboratory experiment, students synthesized a new compound and found that when 11.64 grams of the compound were dissolved in 248.3 grams of benzene, the solution began to boil at 80.407 °C. The compound was also found to be nonvolatile and non-electrolyte. What is the molecular weight they determined for this compound?

Solved • Jan 28, 2020

Boiling Point Elevation

#### Q. The boiling point of benzene C6H6 is 80.10°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in benzene is DDT. How many grams of DDT, C14H9Cl5 (354.5 g/mol), must be dissolved in 245.0 grams of benzene to raise the boiling point by 0.450 °C? Refer to table for the necessary boiling point constant.

Solved • Jan 28, 2020

Boiling Point Elevation

#### Q. Adrenaline is the hormone that triggers the release of extra glucose molecules in times of stress or emergency. A solution of 0.64 g of adrenaline in 36.0 g of CCl4 elevates the boiling point by 0.49 ∘C. Calculate the approximate molar mass of adrenaline from this data. Express your answer to two significant figures and include the appropriate units.

Solved • Jan 26, 2020