LAB 2 ORGANIC CHEM
Name:
Date:
Experiment #:2
Title:Crystallization –
Purification of a Sample of
Impure Naphthalene
Purpose:
The purpose of this experiment is to learn the technique of crystallization and apply it to purify
an impure sample of naphthalene. We will also characterize the pure sample and learn the
effectiveness of recrystallization for purification of organic compounds.
Procedure:
1. Took impure naphthalene and added it to Erlenmeyer flask.
2. Added small amount of methanol to flask and placed it on hot plate.
3. Added solvent at small intervals until solute is visibly soluble in solvent.
4. Removed the flak from hot plate and added small number of charcoal pellets.
5. Heated the solution for few minutes at boiling temperature.
6. Placed fluted filter paper in funnel and placed it at Erlenmeyer flask.
7. Poured the hot impure solution into filter paper.
8. Heated the mother liquor until only 15 mL solvent remained.
