Which of the following is the best support for a separatory funnel during a liquid-liquid extraction in the laboratory?

• A. Beaker
• B. Ring stand with an iron ring
• C. Buret clamp
• D. Test tube rack

Answer: (B)

Verified step by step guidance

1. Understand the purpose of a separatory funnel: it is used to separate immiscible liquids based on their densities during a liquid-liquid extraction.
2. Consider the stability and safety requirements: the funnel must be held securely in an upright position to prevent spills or accidents.
3. Evaluate each option: a beaker and test tube rack do not provide stable vertical support for the funnel; a buret clamp can hold the funnel but is typically designed for narrow tubes and may not provide the best stability.
4. Recognize that a ring stand with an iron ring is designed to hold glassware like funnels securely and upright, providing stable and adjustable support during extractions.
5. Conclude that the ring stand with an iron ring is the best support because it ensures safety, stability, and proper positioning of the separatory funnel during the extraction process.