1. Today’s Title: Miscible or Immiscible?
25 November 2015
Today’s Title: Miscible or Immiscible?
Aims:
Define the terms immiscible and miscible (f)
Understand the difference between miscible and immiscible substances (f)
Describe how immiscible and miscible liquids can be separated (f)
To do:
What do these words mean?
Miscible
Immiscible
Fractional distillation
RWCM: write notes to describe how liquids can be separated

2. How do you separate mixtures of liquids?
Write down how you would separate out oil and vinegar. You have 3 minutes.

3. Immiscible
Immiscible means that the liquids do not dissolve in each other – oil and water are an example.
Stick in your diagram of the separating funnel. Describe in your own words how oil and water can be separated.
Oil and water can be separated using a funnel

4. Use whiteboards to show your answers
What have we learnt so far?
1. What does immiscible mean?
Does dissolve
Doesn't dissolve
Will catch fire
2. Which would be an example of an immiscible mixture?
Oil and water
Liquid air
Food dye
Use whiteboards to show your answers

5. What do you think a miscible liquid is? Write a definition
Use whiteboards to show your answers

6. Miscible
Miscible liquids are liquids that dissolve in each other to make a solution.
Miscible liquids are often separated using fractional distillation.
This is possible as miscible liquids have different boiling points.

7. What process does the diagram show
What process does the diagram show? Can you arrange these words into the correct order?
condensing
cooling
evaporating
heating

8. heating → evaporating → cooling → condensing condensing
Distillation:
Distillation is a process that can be used to separate a pure liquid from a mixture of liquids or a solid. It works when the liquids have different boiling points.
This is the sequence of events in distillation:
heating → evaporating → cooling → condensing condensing

9. Fractional distillation
Remember: Distillation is a process that can be used to separate a pure liquid from a mixture of liquids.
Fractional distillation takes advantage of the fact that different liquids will have different boiling points
heating → evaporating → cooling → condensing

10. E.G:

11. Freezing and boiling points of air
States of matter:
Gas hot
Liquid
Solid cold
Freezing and boiling points of gases in air
Water
Freezes at 0oC
Carbon dioxide
Freezes at -79oC
Oxygen
Boils at -183oC
Nitrogen
Boils at -196oC

12. Gas hot Liquid Solid cold States of matter:
The top of the column is colder than the very bottom -190oC. Nitrogen is still a gas at this point.
-185oC is above the boiling point of nitrogen and so the nitrogen boils and evaporates.
Oxygen
Boils at -183oC
Nitrogen
Boils at -196oC
-200oC is below the boiling points of both nitrogen and oxygen and so they are both liquids.
-185oC is below the boiling point of oxygen and so a lot of it stays as a liquid

13. Use the help list below to label the diagram on fractional distillation of air
AIR IN
-200oC
H2O AND CO2 FREEZE
O2 CONDENSES
LIQUID O2 PIPED OUT
GASEOUS N2 COLLECTED
FRACTIONATING COLUMN
-185oC ABOVE BOILING POIONT N2 SO BOILS AND EVAPORATES
-185oC below BOILING POINT O2 SO MOST STAYS LIQUID
-190oC ALL O2 LIQUID SO FALLS TO BOTTOM OF COLUMN
Swap sheets with someone else in the classroom to peer ass when you are finished

14. Plenary 1. Which of the following liquefies at the lowest temperature?
Nitrogen
Oxygen
Carbon dioxide
2. What is the name of the process that separates air into the different gases?
Cracking
Fractional distillation
Chromatography
3. What piece of equipment can be used to separate immiscible liquids?
Evaporating basin
Filter funnel
Separating funnel
4. What property allows mixtures to be separated by fractional distillation?
Density
Boiling point
Type of bonding

15. Which liquid is miscible? Give a reason for why you think this.
A B

16. Extension work Aims: Define the terms immiscible and miscible (f)
Describe how immiscible and miscible liquids can be separated (f)
Understand the difference between miscible and immiscible substances (f)
Extension work
Explain how we can separate oil from vinegar and oxygen from air. Make sure that you include the words fractional distillation, immiscible, miscible and separating funnel in your answer (6 marks).

18. Definitions
Vector
Scalar

19. What have we learnt so far?
Aims:
Sort vectors from scalars(f)
Explain the difference between vectors and scalars(h)
Speed
Velocity
Temperature
Acceleration
Distance
Displacement
Area
Force
Volume
Air resistance
Weight
Vector
Scalar

20. What have we learnt?
How would you tell the difference between a miscible and a immiscible liquid? (f)
How could you separate out miscible liquids? Can you explain how this works?(a)
Aims:
Sort vectors from scalars(f)
Make an electricity recap poster (f/h)
Explain the difference between vectors and scalars(h)