The Proper Use of a Separatory Funnel

What should you have ready before introducing a sample or solvent to a separatory funnel?

A flask under the separatory funnel, a stopcock closed, and a funnel at the top of the separatory funnel.

Answer:

To properly use a separatory funnel, a stopcock should be in the closed position, a flask should be placed underneath to collect liquids, and a stopper should be used to seal the top. A piece of paper under the collection flask can help detect spills.

Before adding a sample or solvent to a separatory funnel, several steps should be taken to ensure the process is conducted safely and effectively. First, ensure that there is a stopcock in the closed position to prevent the contents from prematurely flowing out. Second, place a flask under the separatory funnel to collect the liquid once the separation process is complete. Lastly, check that a stopper is securely in place at the top of the separatory funnel to prevent any spillage or release of fumes during shaking and after the separation has occurred. It is also a good practice to have a piece of paper under the collection flask to aid in the detection of any drips or spills during the process, which helps in maintaining a clean working area.