Separation and Purification Techniques & Unit 2 Revision

Front

What does Rf value represent in chromatography?

Back

Rf value (retention factor) is a measure of how far a compound travels in a particular solvent compared to the solvent front.

Front

What is the definition of a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together.

Front

What is the purpose of filtration in separation techniques?

Back

Filtration is used to separate solids from liquids or gases using a filter medium that allows only the fluid to pass through.

Front

What is the clear liquid that passes through filter paper called?

Back

The clear liquid is called the filtrate.

Front

What is the difference between a mixture and a compound?

Back

A mixture is a combination of two or more substances that are not chemically bonded, while a compound consists of elements that are chemically bonded.

Front

What is chromatography used for?

Back

Chromatography is used to separate and analyze components in a mixture based on their different affinities to a stationary phase and a mobile phase.

Front

What does it mean if a dye has a higher Rf value than another dye?

Back

It means that the dye with the higher Rf value has traveled further up the chromatography medium, indicating a greater affinity for the mobile phase.

Front

What is the role of the stationary phase in chromatography?

Back

The stationary phase is the solid or liquid that remains fixed in place during chromatography, allowing for the separation of components based on their movement.

Front

What is a solvent in the context of separation techniques?

Back

A solvent is a substance that dissolves a solute, forming a solution, and is used in various separation techniques like chromatography.

Front

What is the significance of the boiling point in distillation?

Back

The boiling point is significant in distillation as it determines the temperature at which a substance will vaporize and separate from the mixture.