Organic Chemistry Caffeine Extraction Quiz (Lab 6)

What is the purpose of the glass wool in the extraction experiment?

To filter out the undissolved material from the tablets

Know about the solvent considerations

Washes with acids and bases are often performed to remove trace amounts of acid or base in the extraction mixture. Reaction between an acid and base leads to the formation of salts. What should be done to remove these salts from the mixture?

The salts are soluble in water and will be removed in the aqueous phase

Why is a large partition coefficient important when it comes to extractions?

It means that the extraction of the target compound into the organic phase is favorable

When performing liquid-liquid extraction, it is important to frequently vent the separatory funnel because ______

Too much pressure can build up inside the separatory funnel

What is the role of sodium sulfate in the caffeine extraction process?

To help dry the extracted product

Know what compounds form emulsions

Aromatic and chlorinated organic solvents

It is common protocol for the upper phase containing the target compound to be removed from the separatory funnel through the stopcock. True or false?

False, it is the bottom layer

If your reaction results in an aqueous mixture containing the target organic compound and mixture of inorganic by-products. What would be the best solvent to perform the extraction with?

An organic solvent

It is proper protocol to point the separatory funnel toward the back of the hood when venting it. True or false?

True