CHM 2046C Module 8 Part II Sample Exam

Part U: Molar Mass Determination Problem 4 points

An aqueous solution contains 0.180 g of an unknown, non volatile/non ionic solute in 50.0 g of water. The solution freezes at -0.040 ^oC. What is the molar mass of the solute?

More sample Molar Mass problems may be found at: Kotz Chap 14 p694 #39-46

Part V: Osmotic Pressure Problem 4 points

Estimate the osmotic pressure of human blood at 37 ^oC. Assume blood is isotonic with 0.16 M NaCl solution, and assume the van’t Hoff factor i is 1.9 for NaCL. Remember the NaCl is ionic.

∏= cRT i

More sample Osmotic Pressure problems may be found at: Kotz Chap 14 p695 #51-54