Final answer:
In preparative chemistry, a separatory funnel is used to separate two immiscible liquids. Opening the taps in the funnel allows the liquids to be separated based on their density.
Step-by-step explanation:
In preparative chemistry, a separatory funnel is used to recover a desired product from a reaction mixture by extracting it into another liquid.
Opening the taps in the separatory funnel is necessary to separate the two immiscible liquids present in the funnel.
The liquids are poured into the funnel and then shaken to bring them into contact.
After shaking, the more dense liquid is allowed to exit through the stopcock at the bottom, while the less dense liquid remains in the funnel.