1. De Lisle Catholic Science College
KS 3 laboratory
Separating mixtures
De Lisle Catholic Science College
Science department

2. Separating mixtures menu
Virtual laboratory:
Separating mixtures menu
Dissolving
Filtering
Evaporating
Distillation

3. solute solution solvent
Dissolving model
solute
Dissolve solute
solution
solvent

4. Filtering filter paper cloudy liquid filter funnel filtrate (clear)
glass rod
filter paper
cloudy liquid
filter funnel
filtrate (clear)
Label diagram

5. How does filtering work?
Filtering model
How does filtering work?
insoluble particles are unable to pass through the tiny holes in the filter paper
filter paper
Start filtration
solvent particles
dissolved particles
insoluble particles

6. Filtering and dissolving key words
Explanation
solid that will not dissolve
solid that will dissolve
liquid that will dissolve solids
liquid with dissolved solid
solid that has dissolved
clear filtered liquid
solution that is ‘full up’
Key words
Insoluble
Solute
Solution
Saturated
Solvent
Filtrate
Soluble
Insoluble
Soluble
Solvent
Solution
Solute
Filtrate
Saturated

7. Heat Heat Evaporation model
What happens to the dissolved solid particles?
dissolved solid gets left behind and forms crystals
solvent vapour
dissolved particles
some solvent particles
Heat

8. Distillation using a Leibig condenser
thermometer
Add labels
100OC
Reading?
cooling water jacket
steam
dissolved solids get left behind
What happens to dissolved solids?
boiling inky water
distillate (pure water)
What is in the bubbles?
steam

9. Evaporation and distillation key words
Explanation
change from a liquid to a gas
change from a gas to a liquid
an evaporated liquid (a gas)
purifying a liquid by first evaporating then condensing
a distilled liquid
Key words
Condense
Vapour
Distil
Distillate
Evaporate
Evaporate
Evaporate
Condense
Vapour
Distil
Distillate

10. Fractional distillation
How does fractional distillation work?
it can separate a mixture of liquids that have different boiling points
the mixture is slowly heated until the liquid with the lowest boiling point starts to boil off from the mixture
this liquid is collected by condensing it

11. De Lisle Catholic Science College
KS 3 laboratory
De Lisle Catholic Science College
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