Final answer:
Recrystallization is a process used to purify compounds by dissolving them in a hot solvent and then cooling the solution, causing the compound to crystallize out. The steps in recrystallization can be remembered using the mnemonic S.D.D.G.C.F.D., which stands for Saturation, Decolorization, Deposition, Gravity filtration, Crystal washing, Filtration, and Drying.
Step-by-step explanation:
Recrystallization is a process used to purify compounds by dissolving them in a hot solvent and then cooling the solution, causing the compound to crystallize out. The steps in recrystallization can be remembered using the mnemonic S.D.D.G.C.F.D., which stands for:
- Saturation: Dissolve the compound in a hot solvent until a saturated solution is formed.
- Decolorization: Addition of decolorizing charcoal to remove impurities that can affect the appearance of the crystals.
- Deposition: Allow the solution to cool slowly, allowing the compound to crystallize and form a deposit.
- Gravity filtration: Separate the crystals from the solvent using gravity filtration.
- Crystal washing: Wash the crystals with a small amount of cold solvent to remove any impurities.
- Filtration: Collect the purified crystals using filtration.
- Drying: Allow the crystals to dry to remove any remaining solvent.