Chapter 7 Separation Technique

Chapter 7

Separation Technique

Lesson objectives

• Explain how the following can be used to separate or extract substances

• Describe the applications of the various separation techniques in homes and food industries

• Understand the different types of separation techniques (filtration, evaporation, distillation and paper chromatography

Filtration (using filter paper)

• Used to separate insoluble substances from water

• Pour the mixture over a filter paper in a filter funnel

• Examples (tea leaves from tea and sand from seawater)

Multiple Choice

Distillation is a process to obtain pure water as a solvent from seatwater

• True

• False

Multiple Choice

The insoluble solid is called the ________________.

• filtrate

• residue

• mixture

• solution

Evaporation

It removes all the water or solvent by evaporation. Example is to obtain dry salt crystals from salt water mixture by evaporation all the water.

Multiple Select

Evaporation method can be used to obtain salt from seawater

• True

• False

Distillation

It removes the solvent/water from the mixture. Example is to obtain pure water from seawater.

Multiple Choice

Distillation is a process to obtain pure water from seawater.

• True

• False

Paper chromatography

To separate colour dyes in a drop of ink

Multiple Choice

Sand from sugar water and sand

• filtration

• distillation

• paper chromatography

• evaporation

Multiple Choice

Dry salt from a solution of salt and water

• filtration

• crystallization

• evaporation

• distillation

Multiple Choice

water and stones

• filtration

• evaporation

• distillation

• chromatography

Multiple Choice

coloured dyes

• paper chromatography

• filtration

• distillation

• evaporation

Multiple Choice

water from seawater

• distillation

• filtration

• evaporation

• chromatography