This document discusses a lesson on polymerization. It includes objectives about hydrocarbons, saturated and unsaturated compounds, and addition polymerization. Students are asked questions to test their understanding, including defining hydrocarbons, the difference between saturated and unsaturated compounds, explaining the bromine test for alkenes, drawing formulas for ethene and its polymer, and modeling polymerization. The document provides feedback on student responses and discussion of polymer properties.

1. On your mini-whiteboards are these
true or false?
1. Gas and oil are the only types of fossil fuels
2. Sulfur dioxide causes acid rain that will kill
plants and aquatic life.
3. Small hydrocarbons have large boiling points
because they have strong intermolecular
forces.
4. CH4 + O2  CO2 + H2O Is the balanced
symbol equation for complete combustion.

2. Polymerisation
Lesson objectives
Recall what a hydrocarbon is (GCSE Grade C)
Describe saturated and unsaturated compounds (GCSE
Grade A)
Describe the test for an alkene (GCSE Grade C) and
explain how it works (GCSE Grade A)
Draw displayed formula of compounds (GCSE Grade C)
Draw displayed formula of an addition polymer from
the monomer and monomer from the polymer (GCSE
Grade A)
Explain how addition polymerisation occurs (GCSE
Grade A)

3. On your Post-it note answer the
questions…..
1. What is a hydrocarbon? (GCSE Grade D)
2. What is the difference between a saturated
(alkane) and an unsaturated (alkene)
compound? (GCSE Grade C)
3. Explain the test for an alkene (unsaturated
compound)? (GCSE Grade A)
4. Draw the displayed formula for ethene (C2H4)
(GCSE grade C)
5. Draw a displayed formula to show an addition
polymer of the monomer ethene (GCSE Grade
A)

4. If you got…
5/5- Exam questions on polymers and produce
either a mind-map to help you remember key
points or revision cards
4/5- Make revision cards relevant to the
question you got wrong and then do exam
questions.
3/5 or less- Group work

5. What do all these have in common?
(GCSE Grade D)
CH4 C5H12
C4H8
C2H6 C3H6 C100H202

6. What do all these have in common?
(GCSE Grade C)
CH4 C5H12
C4H8
C2H6 C3H6 C100H202

7. Alkenes and alkanes (GCSE Grade A)
1. Draw an alkane (ethane, C2H6)
2. Draw an alkene (ethene, C2H4)
3. What is the difference between the two?
4. Label which is unsaturated and which is
saturated
5. How many pair of shared electrons are their
between the single and the double bond?

8. Modeling polymerisation
(GCSE Grade C)
1. Using each other
2. Molymod kits

9. Displayed formula
Exam tip
When you are constructing the
displayed formula for an addition
polymer from a monomer, first
draw the monomer without the
double bond to see what the
repeat unit looks like.

10. n
Reminder:
Extension: There are two forms
of polyethene. One is used in
plastic bags and the other is
used in drainpipes and milk
crates. How might it be possible
to have two different sets of
properties for one polymer?

11. Draw the polymer that was
produced from this alkene called
Propene
1

12. Did you get
it?

13. Draw the polymer Teflon
from the polymerisation of
2

14. Did you get
it?
KEYWORDS: Monomers, Polymers.

15. Draw the polymer that was
produced from this alkene
3

16. Did you get
it?

17. Draw the polymer that was
produced from vinyl chloride
4

18. Did you get
it?

19. What chemical test can we do to test for an
unsaturated or saturated compound?
plus a double bond  COLOURLESS
UNSATURATED
Bromine
Water
plus a single bond  REMAINS ORANGE
SATURATED

20. Grab your Post-it note and answer the
questions…..
1. What is a hydrocarbon? (GCSE Grade D)
2. What is the difference between a saturated
(alkane) and an unsaturated (alkene)
compound? (GCSE Grade C)
3. Explain the test for an alkene (unsaturated
compound)? (GCSE Grade A)
4. Draw the displayed formula for ethene (C2H4)
(GCSE grade C)
5. Draw an addition polymer of the monomer
ethene (GCSE Grade A)
HOMEWORK