Separation techniques

Separation techniques lesson outcomes:

Define pure and mixture

Define soluble

Recall separation techniques including:

Filtration

Crystallisation

Distillation

Chromatography

Multiple Choice

A pure substance is made up of _________ type of thing.

• only one

• more than one

Multiple Choice

A mixture is made up of ________ type pf things

• only one

• more than one

Separation methods help us to separate out a mixture

How we separate the mixture depends on what's in the mixture!

For example...

Say you went to the beach! You used your bucket to scoop up some water but realised there was a lot of sand in there...

What could you do?!

Multiple Choice

Is sand soluble or insoluble?

• Soluble

• Insoluble

Sand is insoluble!

This means that the sand will NOT dissolve in the seawater!

So, you can see and touch the sand in the bucket - so how could you separate this mixture in the lab.

Multiple Choice

Describe how you could separate an INSOLUBLE material (e.g. sand) from a solution.

• Crystallisation

• Filtration

• Distillation

• Chromatography

Filtration

Filtration is used to separate an insoluble substance from a solution.

Open Ended

Filtration is used to separate.... ?

Open Ended

List 3 pieces of equipment used in filtration.

Multiple Choice

Where will the sand be left after filtration?

• In the filter paper

• In the conical flask

Multiple Choice

Where will the seawater be left after filtration

• In the filter paper

• In the conical flask

Success!

You have managed to remove the INSOLUBLE sand from your mixture! All that filtering has made you thirsty, so you decide to take a sip...

YUCK!

The water is salty!

Multiple Choice

There must be salt dissolved in the water! This means that salt is...

• Soluble

• Insoluble

That's right! Salt is soluble!

Something that is soluble CANNOT be removed by filtration! What should you do now...?

Multiple Choice

If I want to keep the salt but get rid of the water I should use...

• Filtration

• Crystalisation

• Distillation

• Chromatography

Crystallisation!

This helps me evaporate all of the water in a solution and just leaves the soluble material (e.g. salt).

Fill in the Blanks

In crystallisation we should pour the solution into a...

Fill in the Blanks

After we have poured our solution into an evaporating dish we should heat it using a...

Fill in the Blanks

Heating the solution with a bunsen burner means that the water will...

Fill in the Blanks

After the water has evaporated we will be left with

in the evaporating dish!

What if I wanted to keep the water from my salty mixture?

Multiple Select

To separate the water from a solution I should use...

• Filtration

• Crystalisation

• Distillation

• Chromatography

Distillation separates the water from a solution!

Multiple Choice

Where is the water being evaporated in distillation?

Multiple Choice

Where is the pure water being collected in distillation?

Multiple Choice

Where is the water being condensed in distillation?