Recrystallization Lab Report

Introduction Recrystallization is a method used to purify solid organic compounds. Using the recrystallization technique, a solid compound is dissolved in a solvent and the compound slowly crystallizes as the solution cools. Using a filtration technique, a pure solid is produced when the molecules of the impure particles in the compound are excluded from the crystal lattice. After obtaining the pure compound, a melting point determination procedure can be done using a mel-temp device to correctly identify the compound if its identity is unknown. In this experiment, the identity of a given unknown organic solid will be discovered using the methods of recrystallization and melting point determination.

Safety Information
• Be sure to add a boiling chip to any liquid before heating it.
• Always wear department approved eye goggles at all times.
• Long pants and closed toe shoes are required.

Table of Reagents

Reagent Mol. Wt. (g/mol) Bp ( ͦ C) Mp ( ͦ C) Density (g/ml)
Acetanilide 135.17 304 113-115 1.219
Fluorene
Fluorene 166.22 295 114-116 1.2
Cyanoacetamide 134.23 284 121-122 1.34
Benzoic Acid 122.12 249 121-123 1.32
Succinimide 99.09 287 123-125 1.124
Oxindole 133.15 227 125-127 1.254
Benzamide 121.14 288 128-130 1.341
Glucose Pentaacetate 120.56 295 131-134 1.245
Cinnamic Acid 148.16 300 133-134 1.25
Benzilic Acid 228.25 180 150-153 1.08
Adipic Acid 146.14 337 152-154 1.36
N-Phenylsuccinimide 175.18 330 155-157 1.25
Salicylic Acid 138.123 211 158-160 1.44
Water 18.02 100 0 1.00

Results and