Y9: Separating Techniques

• Chemistry
• Lower Secondary (Key Stage 3)

Y9: Separating Techniques

Which of these substances are soluble in water?

Soluble

Insoluble

Sugar

Salt

Sand

Gravel

Oil

Nail varnish

Oxygen

Plastic

Coffee

Which mixture could be separated by filtration?

1. Oil + water
2. Sand + water
3. Sand + salt
4. Salt + water

The solid collected by the filter paper is called the...

1. Filtrate
2. Mixture
3. Residue

The liquid that passes through the filter paper is called the...

1. Filtrate
2. Mixture
3. Residue

Filter paper

Funnel

Beaker

Residue

Filtrate

Mixture

Clamp

Put the steps in order.

Add water to the mixture of salt and sand. Stir carefully.

Collect the filtrate.

Set up the apparatus.

Pour the mixture of salt, sand and water into the funnel.

1

2

3

4

How could we separate the salt from the water?

Label the apparatus.

Evaporating basin

Gauze

Bunsen

burner

Heatproof mat

Tripod

What is this separation technique called?

Evaporation separates...

1. an insoluble solid from a liquid.
2. a soluble solid from a liquid.

What does insoluble mean?

Miss Buchanan tries to separate a mixture using evaporation, but it doesn't work. Suggest some possible reasons why.

Bunsen burner

Thermometer

Water in

Water out

Condenser

Water vapour

Flask with inky water

Flask with clean water

Condensed water

Filtration

Evaporation

Distillation

Separates

Example

Insoluble solid from liquid.

Soluble solid from liquid.

Soluble solid and liquid.

Sand and water.

Salt and water.

Ink and water.

Which 2 changes of state take place during distillation?

Miss Buchanan wants to separate some salty water. Why might she choose to use distillation instead of evaporation?

Simple distillation separates several miscible liquids.

1. True
2. False

Fractional distillation uses a fractionating column.

1. True
2. False

Simple distillation evaporates then condenses the solvent to separate it.

1. True
2. False

Evaporation separates a soluble solid from a solvent.

1. True
2. False

Separation techniques are chemical processes.

1. True
2. False

State 2 mistakes this student has made. What effect would each mistake have?

How many pigments are there in cola?

1. 1
2. 2
3. 3
4. 4

How many pigments are there in the fruit drink?

1. 1
2. 2
3. 3
4. 4

Are any of the pigments shared by both drinks? How can you tell?

Describe the differences in the colours used in foods A and B.