Calculate the freezing point and boiling point of a solution containing 10.15 gg of ethylene glycol (C2H6O2)(C2H6O2) in 91.3 mLmL of ethanol. Ethanol has a density of 0.789 g/cm3g/cm3, a freezing point of −−114.1 ∘C∘C, and a boiling point of 78.3 ∘C∘C.     Calculate the freezing point of the solution.   Express the answer in degrees Celsius to one decimal place.     Calculate the boiling point of the solution.   Express the answer in degrees Celsius to one decimal place.

The boiling point of chloroform, CHCI,, is 61.700 °C at 1 atmosphere. K₁(chloroform) 3.67 C/m In a laboratory experiment, students synthesized a new compound and found that when 14.75 grams of the compound were dissolved in 210.9 grams of chloroform, the solution began to boil at 62.364 °C. The compound was also found to be nonvolatile and a non-electrolyte. What is the molecular weight they determined for this compound? g/mol The freezing point of water H₂O is 0.00 °C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in water is antifreeze (ethylene glycol). How many grams of antifreeze, CH₂OHCH₂OH (62.10 g/mol), must be dissolved in 255.0 grams of water to reduce the freezing point by 0.300 °C? Refer to the table for the necessary boiling or freezing point constant. Formula K(°C/m) K(°C/m) Solvent Water H₂O 0.512 Ethanol CH3CH₂OH 1.22 Chloroform CHC13 3.67 Benzene Co He 2.53 Diethyl ether CH3 CH₂OCH₂ CH3 2.02 Mass= 9 1.86 1.99 5.12 An aqueous solution is 40.0% by mass…

Phenanthrene, C14H10, is an aromatic hydrocarbon. Some phenanthrene is dissolved in 50.0 g of benzene and the boiling point of the resulting solution is 80.51°C. What mass of phenanthrene must have been dissolved? The Kb for benzene is 2.53 °C/m and the boiling point of pure benzene is 80.2°C.

Solvent Formula Diethyl ether Water Ethanol Chloroform CHCl3 Benzene C6H6 H₂O CH3 CH₂ OH Kb (°C/m) K(°C/m) 0.512 The molality of the solution is The freezing point of the solution is 1.22 3.67 2.53 CH3 CH₂ OCH₂ CH3 2.02 m. 1.86 1.99 5.12 °C.