Determination of molar mass based on colligative properties

prelab assignment  (5 points) due at the begining of the lab

sketch data table for experimental data (see purpose & content of lab report)

purpose

compare the determination of the molar mass of a solute based upon the solution's boiling point versus freezing point

 

materials

Bunsen burner; ring stand, metal ring, wire mesh; beaker; temperature probe

water; ice; NaCl

methods / data analysis

calibrate the temperature probe

obtain heating curve to determine boiling point - of water & solution

obtain cooling curve to determine freezing point - of water & solution

 

Content of lab report [20 points]

data analysis

data table of your experimental data

determine the solute's molar mass based upon your experimental data

discussion

accuracy of the determination of the solute's molar mass; use statistics (include interpretation of p-value) to support your response