DOWNLOAD: http://chemconnections.org/general/chem120/fp results-2012.xls
fp Depression
MM (g/mol)
Lauric Acid C12H24O2 200.32 solvent
w/ Benzoic acid C7H8O2 122.12 solute
Lab Data AM
Group #
1 2 3 4 5 6 7 8 9 10
                       
mass (g) lauric acid #1 4.86 5.37 4.72 4.67 5.07 5.15 4.91
fp #1 oC 42.5 41.3 42.7 44.6 44.3 45.0 47.5
mass (g) lauric acid #2 8.11 8.34 8.01 8.33 8.40 8.12 7.99
mass (g) benzoic acid #2 1.10 1.17 1.02 1.15 1.03 1.17 1.00
fp #2 oC 36.7 35.0 39.6 34.4 39.7 39.6 39.9
mass (g) lauric acid #3 8.05 8.03 7.96 8.08 8.24 8.02 8.00
mass (g) benzoic acid #3 0.53 0.59 0.52 0.56 0.52 0.53 0.51
fp #3 oC 39.7 40.3 39.6 39.2 41.8 43.4 44.7
mass (g) lauric acid #4 8.02 8.01 8.15 8.12 8.05 8.59 8.00
mass (g) benzoic acid #4 1.53 1.52 1.54 1.54 1.46 1.48 1.50
fp #4 oC 37.3 36.6 35.2 40.4 37.8 38.3 37.8
                       
fp Depression
MM (g/mol)
Lauric Acid C12H24O2 200.32 solvent
w/ Benzoic acid C7H8O2 122.12 solute
Lab Data PM
Group #
1 2 3 4 5 6 7 8 9 10
                       
mass (g) lauric acid #1 4.25 5.63 5.41 5.63 5.07 4.44 4.91
fp #1 oC 41.0 46.7 44.7 45.2 44.3 47.7 47.5
mass (g) lauric acid #2 7.99 8.00 8.00 8.01 8.40 8.00 7.99
mass (g) benzoic acid #2 0.98 1.00 1.08 0.51 1.03 1.00 1.00
fp #2 oC 41.8 40.7 40.5 42.5 39.7 39.9 39.9
mass (g) lauric acid #3 8.03 7.99 8.00 8.01 8.24 8.00 8.00
mass (g) benzoic acid #3 0.41 0.50 0.60 1.05 0.52 0.50 0.51
fp #3 oC 43.8 43.5 41.9 40.6 41.8 41.4 44.7
mass (g) lauric acid #4 8.03 7.99 8.02 8.01 8.05 8.00 8.00
mass (g) benzoic acid #4 1.44 1.49 1.53 1.54 1.46 1.50 1.50
fp #4 oC 37.9 37.4 37.4 37.4 37.8 38.0 37.8