Purification of Impure trans-Cinnamic Acid by Recrystallization

These flashcards cover key terms and definitions related to the purification process of trans-cinnamic acid through recrystallization, as outlined in the lecture notes.

Recrystallization

A common technique used to purify solids by dissolving them in a solvent and then allowing them to crystallize out.

trans-Cinnamic Acid (CA)

An organic compound that serves as the primary substance to be purified in this experiment.

Urea (U)

A water-soluble impurity that is mixed with trans-cinnamic acid prior to purification.

Boiling Stone

A small piece of porous material added to liquids being heated to prevent bumping and provide smoother boiling.

Gravity Filtration

A technique used to separate solids from a liquid using gravity and filter paper.

Fluted Filter Paper

Filter paper designed with folds to increase surface area for better filtration efficiency.

Ice-Water Bath

A method used to cool a solution rapidly; involves placing a flask in a beaker filled with ice and water.

Vacuum Filtration

A technique that uses reduced pressure to speed up the filtration process and collect solids.

Percentage Recovery

A calculation used to determine the efficiency of a purification process, expressed as the weight of the purified product compared to the initial weight.

Mel-Temp Apparatus

A device used to determine the melting point range of a substance, critical to assess purity.

Mother-Liquor

The liquid remaining after crystallization, often containing impurities.