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Recrystallization

A method to purify a solid by separating the substance of interest from impurities based on solubility.

Solvent Selection

Choosing a solvent that dissolves the compound of interest at high temperatures but not at low temperatures, while impurities remain either insoluble or fully soluble.

Volatility

The ability of a substance to evaporate easily; important for the choice of solvent in recrystallization.

Filtration

A technique used to separate solids from liquids, specifically in the context of collecting crystallized solids.

Melting Point

The temperature at which a solid turns into a liquid, used to assess the purity of a compound.

Impurity

Any substance other than the desired compound that can affect properties such as melting point and solubility.

Aspirin (Acetylsalicylic acid)

A relatively nonpolar organic compound which is slightly soluble in water, its solubility increases with temperature.

Vacuum Filtration

A method that uses vacuum pressure to speed up the filtration process and dry the solid and filter paper faster.

Cooling Process

The slow cooling of a dissolving solution to improve the crystallization and ensure larger crystals form.

Büchner Funnel

Apparatus used in vacuum filtration to separate solids from liquids using filter paper.