CHM 2046C Module 8 Part II Sample Exam

Part S: Boiling Point Elevation Problem 4 points

A solution of glycerol, C₃H₅(OH)₃, in 735 g of water has a boiling point of 104.4 ^oC at a pressure of 760 mm Hg. What is the mass of glycerol in the solution? What is the mole fraction of the SOLUTE? Assume the solute to be a nonvolatile solute and the k_bp of water is + 0.52 ^oC/m .

More sample Boiling Point Elevation problems may be found at: Kotz 6^th Chap 14

p 693 #29-34

Part T: Freezing Point Depression Problem 4 points

What mass of ethylene glycol, HOCH₂CH₂OH, must be added to 6.50 Kg of water to lower the freezing point of the water from 0.0 to -10.0 ^oC. (This is supersize car radiator)

More sample Freezing Point Depression problems may be found at: Kotz 6thChap 14

p 694 #35-38