A separatory funnel is a laboratory glassware used to separate two immiscible liquids, typically an organic solvent and water. It has a pear-shaped body with a stopcock at the bottom, allowing controlled drainage of the liquid. The funnel is often used in processes like liquid-liquid extraction, where different substances can be isolated based on their solubility. To use a separatory funnel, the two liquids are added, and the funnel is shaken gently to mix them. After settling, the denser liquid collects at the bottom, and the stopcock is opened to release it. This method is essential in chemistry for purifying compounds and conducting reactions involving organic chemistry and solvent extraction.