Separation and Purification Techniques & Unit 2 Revision

Front

What is a locating agent in chromatography?

Back

A locating agent is a substance used to make colorless substances visible on a chromatogram by reacting with them to produce a colored compound.

Front

What separation method is used to separate a mixture of soil and water?

Back

Filtration is the method used to separate a mixture of soil and water.

Front

Which separation technique is used to obtain pure water from seawater?

Back

Simple distillation is used to obtain pure water from seawater.

Front

What does the Rf value indicate in chromatography?

Back

The Rf value indicates the relative distance traveled by a substance compared to the solvent front; a higher Rf value means the substance traveled further.

Front

What is the definition of insoluble?

Back

Insoluble refers to a substance that does not dissolve in a solvent, such as sand in water.

Front

What is the principle behind filtration?

Back

Filtration is based on the size difference between particles; it separates solids from liquids or gases using a filter.

Front

What is distillation used for?

Back

Distillation is used to separate components of a mixture based on differences in boiling points.

Front

What is chromatography?

Back

Chromatography is a technique used to separate mixtures into their individual components based on their movement through a stationary phase.

Front

What is the purpose of evaporation in separation techniques?

Back

Evaporation is used to separate a solvent from a solute by converting the solvent into vapor.

Front

What does it mean if a substance is soluble?

Back

A soluble substance is one that can dissolve in a solvent, forming a solution.