Liquid-Liquid Extraction

The tutorial explains the process of liquid-liquid extraction, a technique used to separate compounds based on their chemical properties. It covers the use of a separatory funnel to separate immiscible liquids, the role of drying agents, and the steps to isolate pure compounds. The tutorial emphasizes the importance of understanding chemical properties like solubility and reactivity in the extraction process.

What is the primary purpose of extraction in chemistry?

• To separate components based on properties like solubility and polarity

• To separate components based on particle size

• To mix two immiscible liquids

• To dissolve solids in liquids

In a liquid-liquid extraction, what are the two phases typically involved?

• Organic and aqueous

• Solid and gas

• Gas and liquid

• Solid and liquid

What is the function of a separatory funnel in the extraction process?

• To heat the mixture

• To measure the density of liquids

• To separate two immiscible liquids of different densities

• To mix two miscible liquids

How can you identify the aqueous layer in a separatory funnel?

• By adding a bit of water and seeing which layer grows

• By checking the color

• By using a pH meter

• By measuring the temperature

What is the purpose of inverting and swirling the separatory funnel during extraction?

• To measure the volume of the mixture

• To ensure complete mixing and reaction

• To cool down the mixture

• To separate the layers

Why is it important to perform multiple extractions?

• To increase the temperature

• To maximize the yield of the desired compound

• To change the color of the solution

• To reduce the volume of the mixture

What is the role of a drying agent in the extraction process?

• To neutralize the solution

• To increase the density of the aqueous layer

• To remove residual water from the organic layer

• To dissolve the organic compound

How is benzoic acid recovered from sodium benzoate in the aqueous layer?

• By cooling the solution

• By adding a strong base

• By adding a strong acid

• By heating the solution

What is the significance of liquid-liquid extraction in industry?

• It is used for extracting natural products like caffeine

• It is used for heating solutions

• It is used for mixing chemicals

• It is used for measuring pH levels

What happens to the organic solvent after the extraction process is complete?

• It is discarded

• It is used to dissolve more compounds

• It is mixed with water

• It is evaporated to leave behind the pure compound