DePaul UniversityCHE 132 1)Ice cream is made by freezing a liquid mixture that can be approximated as an aqueous solution that is 34

DePaul UniversityCHE 132

1)Ice cream is made by freezing a liquid mixture that can be approximated as an aqueous solution that is 34.0% by mass sucrose (C12H22O11). Determine the temperature at which ice crystals would first begin to form in this solution. Kf for water is 1.86°C·kg·mol-1; the normal freezing point for water 0.00 ?C.

2.) A 2.00 g sample of a biomolecule is dissolved in 15.0 g of CCl4. The boiling point of this solution is 77.85°C. What is the molar mass of the biomolecule? The boiling point of pure CCl4 is 76.50°C and the value of Kb for CCl4 is 5.03°C/m.