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6.269
ORGANIC FAMILIES
This activity assesses
Unit
Element
8946
1
2
3
Characterise the properties and reactions of selected organic families (Level 2)
Name and draw the structural formulae of organic compounds.
Recognise the characteristic reactions of unsaturated organic compounds.
Describe the characteristic properties and reactions of some simple functional groups.
INSTRUCTIONS
Task 1 Naming Organic Compounds
Conditions
Formal
1 Name each of the following organic compounds according to the IUPAC system.
Write each answer in the space provided.
a
H
c
H
H
H
H
C
C
C
H
Cl H
b
H
H
H
H
H
H
H
C
C
C
C
d
H
H
H
f
H
H
C
C
C
H
H
O
ORGANIC FAMILIES
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O
H
CH3 H
e
C
OH
H
H
H
H
C
C
C
O
H
H
H
H
H
H
H
C
C
C
C
H
OH H
H
H
H
H
H
H
H
C
C
C
C
C
C
H
H
H
H
H
H
H
H
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ASSESSMENT GUIDE: CHEMISTRY - MAY 1998
6.270
Task 2 Drawing Structures for Organic Compounds
Conditions
Formal
The structural formula for butane can be represented as:
Draw structural formula for each of the following
organic compounds.
H
H
H
H
H
C
C
C
C
H
H
H
H
a
2-methylbutane
b
propan-2-ol
c
butanoic acid
d
propyl ethanoate
e
2,3-dichloropentane
f
but-2-yne
H
1.1
Task 3 Structural Isomers of Organic Compounds
Conditions:
Formal
Draw 4 structural isomers for the alcohol C4H9OH.
ORGANIC FAMILIES
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6.272
Which of the following are structural isomers of butane? Write the letters of the molecules of
your choice in the box below.
a
CH3 - CH2 - CH2 - CH3
b
CH3 - CH2 - CH3
c
CH3 - CH2 - CH2 - CH2 - CH3
d
CH3 - CH(CH3) - CH3
Structural isomers are
1.2
Task 4 Identifying Saturated and Unsaturated Organic Compounds
Conditions:
Practical
You have been given 3 liquid samples - X, Y and Z. You are required to describe each of
these as saturated or unsaturated using your results obtained from tests with bromine water
and potassium permanganate solution.
To test each sample, place about 10 drops of the liquid into 2 test tubes. To one test tube add
5 drops of bromine solution and to the other test tube 5 drops of potassium permanganate
solution. Shake carefully to mix. Record your observations in the table below.
Note You are required to wear safety glasses and the contents of your test tubes are to
be put into an organic wastes bottle, not down the sink.
bromine solution added
potassium permanganate solution added
liquid X
liquid Y
liquid Z
Which liquids are
saturated
unsaturated
2.1
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ASSESSMENT GUIDE: CHEMISTRY - APRIL 1998
6.273
Task 5 Addition Reactions
Conditions:
Formal
Unsaturated hydrocarbons will readily undergo addition reactions. Draw the structural
formula for the product of each of the following addition reactions.
H
a
H
C=C
H
HCl
+
H2O
H
+
Cl2
H
+
H2
H
H
b
+
H
C=C
H
H
H
H H
c
C=C
C
H
H
H
H H
d
C=C
H
C
H
2.2
Task 6 Polymerisation Reactions
Conditions:
Formal
Addition polymers are formed by the addition of a larger number of alkene monomer
molecules. For each of the following draw two of the repeating units of the addition polymer.
H
a
H
H
b
H
H
c
H
monomer
H
C=C
H
Cl
C=C
H
H
C=C
CH3
two repeating units of the polymer
2.3
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ASSESSMENT GUIDE: CHEMISTRY - MAY 1998
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Task 7 Identifying Alcohols, Carboxylic Acids and Alcohols
Conditions:
Practical
You have been given 4 liquid samples - P, Q, R and S. Using your results obtained from the
tests below you are required to determine whether each liquid is an alcohol, a carboxylic
acid or an ester. Record your observations for the tests in the table below.
Tests
a Place 5 drops of the liquid in a test tube and add 2 drops of universal indicator solution.
b Carefully smell the liquid.
c Place 1 mL of the liquid in a test tube. Add 1 mL of sulfuric acid solution and 10 drops of
potassium dichromate solution. Stand the test tube in a hot water bath for two minutes.
Note You are required to wear safety glasses and the contents of your test tubes are to be put
into an organic wastes bottle, not down the sink.
universal indicator added
smell
acidified potassium
dichromate solution
added
liquid
P
liquid
Q
liquid
R
liquid
S
Use these results to identify the functional group - alcohol, carboxylic acid or ester.
P
Q
R
S
3.1
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Task 8 Reactions Involving Alcohols, Carboxylic Acids and Esters
Conditions:
Formal
1 Alcohols can be oxidised to form carboxylic acids. Complete the following equations by
giving the name or structural formula of the carboxylic acid product.
a methanol + oxidising agent
b butan-1-ol + oxidising agent
c
H
d
H
H
H
C
C
H
H
OH
H
H
H
C
C
C
H
H
H
+ oxidising agent
OH + oxidising agent
2 Esters are formed when alcohols react with carboxylic acids in the presence of a suitable
catalyst. Complete the following equations by giving the name or structural formula of
the ester product.
a methanol + ethanoic acid
b butan-1-ol + methanoic acid
c
H
d
H
H
H
C
C
H
H
H
H
H
C
C
C
H
H
H
+ H
OH
H
H
C
C
C
H
H
O
OH
H
OH + H
C
C
H
O
OH
3.2
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Assessment Schedule - Organic Families
Unit 8946 Characterise the properties and reactions of selected organic families (Level 2)
Task
1
2
3
Evidence
Judgement
(The answers or performance expected from the students)
(A statement that defines the
standard to be achieved)
Element
1.1
1.1
1.2
a
b
c
d
e
f
a, b, d, e must be correct.
2-chloropropane
methyl propanoate
3-methylbut-1-ene
butan-2-ol or 2-butanol
propanoic acid
hexane
c or f correct.
CH3 - CH(CH3) - CH2 - CH3
CH3 - CH(OH) - CH3
CH3 - CH2 - CH2 - C- OH
O
d CH3 - CH2 - CH2 - O - C - CH3
O
e CH3 - CHCl - CHCl - CH2 - CH3
f CH3 - C C - CH3
b, c, d, e must be correct.
a or f correct.
CH3 - CH2 - CH2 - CH2OH
CH3 - CH(OH) - CH2 - CH3
CH3 - C(OH) - CH3
3 correct isomers of butanol.
Either full structures or
condensed structures.
All H atoms must be shown.
a
b
c
CH3
CH2(OH) - CH - CH3
CH3
Structural isomers: a and d
4
2.1
Saturated
X and Z
Unsaturated
Y
Orange
colour
remains.
Orange
colour goes
colourless.
Either full structures or
condensed structures.
All H atoms must be shown.
Both correct.
Purple colour
remains.
Observations recorded correctly.
X, Y and Z correctly identified
Purple colour
goes,
forms brown
precipitate.
5
2.2
a
b
c
d
CH3 - CH2Cl
CH3 - CH2OH
CH2Cl - CHCl - CH3
CH3 - CH2 - CH3
3 correct.
Either full structures or
condensed structures.
All H atoms must be shown.
6
2.3
a
b
c
- CH2 - CH2 - CH2 - CH2 - CH2 - CHCl - CH2 - CHCl - CH2 - CH(CH3) - CH2 - CH(CH3) -
2 correct.
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ASSESSMENT SCHEDULE 2/2
ASSESSMENT GUIDE: CHEMISTRY - MAY1998
6.277
Task
7
Evidence
Judgement
(The answers or performance expected from the students)
(A statement that defines the
standard to be achieved)
Element
3.1
indicator
smell
H+/Cr2O72-
P
red
sharp
stays orange
Q
stays green
mild
goes green
R
stays green
fruity
stays orange
S
stays green
mild
goes green
P
R
8
3.2
carboxylic acid
ester
Q
S
Observations recorded correctly.
3 correct classifications.
alcohol
alcohol
1
a
b
c
methanoic acid (HCOOH)
butanoic acid (CH3CH2CH2COOH)
CH3 - C - OH (ethanoic acid)
O
d CH3 - CH2 - C - OH (propanoic acid)
O
Name or formula may be given.
3 correct.
2
a
b
c
Name or formula may be given.
3 correct.
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methyl ethanoate
butyl methanoate
CH3 - CH2 - O - C - CH2 - CH3
O
d CH3 - CH2 - CH2 - O - C - CH3
O
ASSESSMENT SCHEDULE 1/2
ASSESSMENT GUIDE: CHEMISTRY - MAY 1998