1. What is the freezing point of an aqueous 2.00m NaCl solution? K_f of water is 1.86⁰C/m.

2. Determine the freezing point of a solution that is made of 3.60g of glucose C₆H₁₂O₆ in 20.0g of water. K_f of water is 1.86 ^oC/m.

3. Reserpine is a substance that is used as a tranquilizer and sedative. A solution containing 0.20g of reserpine in 5.0 g of camphor (K_f = 40.0 ^oC/m) gives a freezing point 2.63^oC below the freezing point of pure camphor. Determine the molecular weight of reserpine.

4. The melting point of pure benzene is 278.70 K and K_f 4.90 K/m. When 2.10 g of an unknown solute is added to 50.0g of benzene, the freezing point of the solution is 277.60 K. Determine the molecular weight of the unknown.

5. The freezing point of a solution prepared with 3.54g of acetamide (C₂H₅ON) to 200.0g of naphthalene (C₁₀H₈) was 78.2^oC. Pure naphthalene solidified at 80.2^oC. Determine the freezing point constant for naphthalene.

6. How many grams of antifreeze (C₂H₆O₂) need be added to 200.0g of water to have a solution that will not freeze at the temperature -10 ^oC? K_f of water is 1.86^oC/m