The document describes an experiment to recrystallize M-Nitroaniline. Recrystallization is a process where a solute is dissolved in a hot solvent and then allowed to crystallize as the solution cools. The procedure involves dissolving the M-Nitroaniline sample in a minimum volume of hot solvent, filtering any insoluble impurities, slowly cooling the solution to induce crystallization, recovering the crystals through vacuum filtration, washing with cold solvent, and allowing the crystals to dry before determining melting point. The result was that M-Nitroaniline was successfully recrystallized with a melting point of 120°C.

1. Experiment :1- Introduction
MR. Shelake R.M.

2. Aim
• To study the recrystallization of M-
Nitroaniline

3. What is Recrystallization?
- The process where a solution is created by
dissolving a solute in a solvent at or near its
boiling point.

4. Principle:
the amount of solute that can be dissolved by a
solvent increases with temperature.

5. Procedure
1. Dissolve the solid sample in a minimum
volume of hot solvent with a boiling stone or
boiling stick present.
2. If insoluble impurities are present or charcoal
treatment is used, gravity filter the hot solution
through a fluted filter paper.

6. • 3. Cool the solution slowly to room
temperature and then in an ice-water bath to
induce crystallization.
• 4. Recover the crystals from the cooled
recrystallization mixture by vacuum filtration

7. • 5. Wash the crystals with a small amount of
cold solvent.
• 6. Allow the crystals to air-dry completely on a
watch glass before weighing them and
determining their melting point.

8. Hot gravity filtration

9. Result
• Recrystallization of Mi nitroaniline 120oc was
performed.

10. EXPT NO. 2