PART 3
WHAT YOU MUST
KNOW ABOUT
CHEMISTRY
PAPER 3
MASTERING PAPER 3 : THE SCORE
To Score Paper 3 is To Tackle Paper 3
KAMAL ARIFFIN BIN SAAIM
SMK DATO’ BENTARA LUAR BATU PAHAT
e-mel : kamal_ariffin2006@yahoo.com
website: http://kemhawk.webs.com/
1
Past SPM Question Scoring
YEAR: 2005
YEAR: 2006
YEAR: 2004
YEAR: 2007
PART 3
No. 1
No. 2
YEAR: 2003
YEAR: 2008
No. 1
No. 2
CHEMISTRY PAPER 3 4541/3
2
Past SPM Question Scoring
PART 3
Scoring SPM Paper 3 2007
Question No. 1
Question No. 2
[Click button to see the question]
CHEMISTRY PAPER 3 4541/3
3
PART 3
SPM 2007 Question no. 1
Tips to write a good report:
1(a)(i) : Able to read all reading accurately to one
decimal point with unit.
Sample answer:
Experiment 1
28.0 oC
36.0 oC
Experiment II
29.0 oC
25.0 oC
Experiment III
27.0 oC
32.0 oC
Experiment IV
30.0 oC
27.0 oC
CHEMISTRY PAPER 3 4541/3
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SPM 2007 Question no. 1
PART 3
Tips to write a good report:
1(a)(ii) : Able to construct a table that contains the
following information.
Sample answer;
1. Heading in the table:
Experiment, Initial temperature,
Highest/Lowest temperature
2. Transfer all temperature reading from
(a)(i) correctly
3. With unit at heading
CHEMISTRY PAPER 3 4541/3
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PART 3
SPM 2007 Question no. 1
Tips to write a good report:
Sample answer:
I/1
Initial
temperature
/oC
28.0
Highest / Lowest
temperature
/o C
36.0
II / 2
29.0
25.0
III / 3
27.0
32.0
IV / 4
30.0
27.0
Experiment
CHEMISTRY PAPER 3 4541/3
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PART 3
SPM 2007 Question no. 1
Tips to write a good report:
1(a)(iii) : Able to make correct classification for the
four experiments.
Sample answer:
Exothermic reaction
Endothermic reaction
I
III
II
IV
CHEMISTRY PAPER 3 4541/3
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SPM 2007 Question no. 1
PART 3
Tips to write a good report:
1(b)(i) : Able to give any three things correctly that
must be kept constant.
Sample answer:
1. volume of water
2. polystyrene cups
3. thermometers
4. mass of sodium hydroxide
5. reject: amount, quantity
6. size of cups
7. sodium hydroxide and water
CHEMISTRY PAPER 3 4541/3
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SPM 2007 Question no. 1
PART 3
Tips to write a good report:
1(b)(ii) :Able to state the hypothesis accurately
Sample answer:
1. The reaction between sodium hydroxide and
water is an exothermic / endothermic reaction.
2. The reaction between NaOH and water results
in increase/decrease in temperature.
3. When NaOH dissolves/added in water, it
increases/decreases in temperature/released
heat/absorbed heat
CHEMISTRY PAPER 3 4541/3
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SPM 2007 Question no. 1
PART 3
Tips to write a good report:
1(c)(i) :Able to state;
Dropped/decreased 4 oC // - 4 oC // 29 – 25 oC
Able to state two correct reasons;
Sample answer:
1. Heat/energy is absorbed // Endothermic reaction
2. The energy in product is more than the energy in
reactants
3. The heat/energy absorbed during bond breaking
is greater than the heat/energy released during
the bond making.
CHEMISTRY PAPER 3 4541/3
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SPM 2007 Question no. 1
PART 3
Tips to write a good report:
1(c)(ii) : Able to give the operational definition accurately
by stating the following three information.
- The temperature decreases // The
temperature goes down/dropped
- Endothermic reaction
- Heat/energy absorbed
Sample answer:
The decrease in temperature shows that
endothermic reaction happens where
heat/energy is absorbed from the
surroundings
CHEMISTRY PAPER 3 4541/3
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SPM 2007 Question no. 1
PART 3
Tips to write a good report:
1(d) : Able to predict the three temperature readings
correctly.
Sample answer:
1. Sulphuric acid
2. Nitric acid
3. Ethanoic acid
CHEMISTRY PAPER 3 4541/3
37 oC
32 oC
28 – 31 oC
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SPM 2007 Question no. 1
PART 3
Tips to write a good report:
1(e)(i) : Able to state three correct observations.
Sample answer:
1. Final temperature is lower than the initial
temperature. // The temperature
decreases // Level of mercury decreases //
thermometer reading decreases.
2. Bubbles are release // effervescence.
3. The volume of the solution is greater/
increases // level of solution increases/
higher.
CHEMISTRY PAPER 3 4541/3
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SPM 2007 Question no. 1
PART 3
Tips to write a good report:
1(e)(ii) : Able to make an accurate inference based on the
chemical equations.
Sample answer:
(Endothermic reaction)/heat/energy is
absorbed) when hydrochloric acid/HCl with
sodium hydrogen carbonate/NaHCO3 to
produce sodium chloride/NaCl, carbon
dioxide/CO2 and water.
CHEMISTRY PAPER 3 4541/3
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SPM 2007 Question no. 1
PART 3
Tips to write a good report:
1(e)(iii) : Able to sketch the graph of the change of the
volume of CO2 gas against time by showing the
following three information;
1. The axes are labeled correctly
2. Correct unit
3. Curve on the graph shows the increase of
volume
CHEMISTRY PAPER 3 4541/3
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SPM 2007 Question no. 1
PART 3
Tips to write a good report:
Sample answer:
Volume of
CO2 / cm3
Time / minute
CHEMISTRY PAPER 3 4541/3
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SPM 2007 Question no. 2
PART 3
Identify the factor that influences the differences in
the voltage.
Plan a laboratory experiment to construct an
electrochemical cell to determine one factor that
influences the differences in the voltage.
CHEMISTRY PAPER 3 4541/3
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PART 3
SPM 2007 Question no. 2
Tips to write a good report:
1. Problem statement: Start with ‘Does …..’
Does the position of the two metals in
Electrochemistry Series affect the voltage?
CHEMISTRY PAPER 3 4541/3
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PART 3
SPM 2007 Question no. 2
Tips to write a good report:
2. Aim: Find “Statement” from the question
To determine one factor that influences
the differences in the voltage
CHEMISTRY PAPER 3 4541/3
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PART 3
SPM 2007 Question no. 2
Tips to write a good report:
3. Variables : Always given in the question.
Manipulated variable : Pairs of metals
Responding variables: Voltage
Constant variable
CHEMISTRY PAPER 3 4541/3
: Electrolyte /name
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PART 3
SPM 2007 Question no. 2
Tips to write a good report:
4. Hypothesis : Manipulated + responding +
direction
The further the distance of the pair of metals
in the Electrochemical Series, the voltage
become greater.
CHEMISTRY PAPER 3 4541/3
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PART 3
SPM 2007 Question no. 2
Tips to write a good report:
5. Materials and apparatus :
List all the materials and apparatus that
involves,
Aluminium, zinc, copper,
beaker, voltmeter, wires, sand paper, the
copper(II) sulphate solution (any suitable),
CHEMISTRY PAPER 3 4541/3
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PART 3
Tips:
Name at least three metals below than Ca in
ECS
If use K, Na, Ca : score1
If use any acid as electrolyte, the molarities is
less than 1.0 mol dm-3
If use concentrated/bench/molarity greater
than 1.0 moldm-3 : score1
No need to state the volume and the
concentration of the electrolyte. If you do make
sure it suitable/accurate.
CHEMISTRY PAPER 3 4541/3
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PART 3
SPM 2007 Question no. 2
Tips to write a good report:
6. Procedures: use simple sentences, passive or
active voice, use keywords, sequence
Key word:
pour, dip, connect, record, repeat, stir,
heated, observe, measure, add, put into,
CHEMISTRY PAPER 3 4541/3
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PART 3
Not Suggested Answers:
6. Procedures: use simple sentences, passive or
active voice, use keywords, sequence
CHEMISTRY PAPER 3 4541/3
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PART 3
Suggested Answers:
1. Pour the copper sulphate into a beaker.
2. Clean aluminium and copper with sand
paper.
3. Dip aluminium and copper into the solution.
4. Connect it to the voltmeter // complete the
circuit.
5. Record the voltmeter reading.
6. Repeat steps 1-5 / experiment by substituting
aluminium with zinc / one metal for another.
CHEMISTRY PAPER 3 4541/3
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PART 3
SPM 2007 Question no. 2
Tips to write a good report:
7. Tabulation: heading for manipulated and
responding variables,
Responding
Manipulated
units,
Variable
Variable
Pairs of metal
Voltage (V)
Aluminium and copper
HOME
Zinc and copper
CHEMISTRY PAPER 3 4541/3
Max: Score 2
27
Past SPM Question Scoring
PART 3
Scoring SPM Paper 3 2008
Question No. 1
Question No. 2
[Click button to see the question]
CHEMISTRY PAPER 3 4541/3
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SPM 2008 Question no. 1
PART 3
Tips to write a good report:
1(a) : Able to state the relationship correctly between
the manipulated variable and the responding
variable.
Sample answer:
Acid coagulated latex while alkali does not
coagulate the latex.
CHEMISTRY PAPER 3 4541/3
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SPM 2008 Question no. 1
PART 4
Tips to write a good report:
1(b) : Able to state the time taken in Set I and Set II
accurately with correct unit.
Sample answer:
Set I : 5 minutes // 300 second // 0.03 hours
Set II: 360 minutes // 21600 seconds // 6 hours
CHEMISTRY PAPER 3 4541/3
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PART 4
SPM 2008 Question no. 1
Tips to write a good report:
1(c) : Able to construct a table to record the time
taken for Set I and Set III of experiment that
contains:
1. Correct titles
2. Readings and units
Sample answer:
Set
Time taken /minutes
I
5
III
360
CHEMISTRY PAPER 3 4541/3
Or
Set
Time taken
I
5 minutes
III
6 hours
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SPM 2008 Question no. 1
PART 4
Tips to write a good report:
1(d): Able to state all correct observations, one from
each set.
Sample answer:
Set I : 1.
2.
Set II: 1.
2.
3.
Set III: 1.
2.
CHEMISTRY PAPER 3 4541/3
Latex coagulates
A solid lump is formed
Latex does not coagulate
No change
Liquid
Latex coagulates
Solid lump is formed
32
SPM 2008 Question no. 1
PART 4
Tips to write a good report:
1(e): Able to state the correct operational definition
for coagulation of latex correctly.
Sample answer:
Latex becomes solid when acid is added //
Latex becomes solid when exposed to air
CHEMISTRY PAPER 3 4541/3
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SPM 2008 Question no. 1
PART 4
Tips to write a good report:
1(f): Able to state all three variables correctly
Sample answer:
Manipulated variable: Ethanoic acid / Acid ,
Ammonia solution / Alkali
Responding Variable: Coagulate/Does not coagulate//
Time taken for coagulation
Constant Variable:
CHEMISTRY PAPER 3 4541/3
Volume of latex/acid/(ammonia
solution)/alkali//latex//
temperature
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SPM 2008 Question no. 1
PART 4
Tips to write a good report:
1(g)(i) : Able to state the observation correctly
Sample answer:
Latex coagulate //
Latex becomes white //
Latex is solidified
CHEMISTRY PAPER 3 4541/3
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SPM 2008 Question no. 1
PART 4
Tips to write a good report:
1(g)(ii) : Able to give both explanations correctly
Sample answer:
1. Ammonia is neutralized //
OH- ions reacted with H+ ions
2. Acid / H+ ions neutralized (negative
charged) / (protein membrane)
CHEMISTRY PAPER 3 4541/3
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SPM 2008 Question no. 1
PART 4
Tips to write a good report:
1(h) : Able to explain the following aspects correctly
1. The presence of bacteria
2. Bacteria produce acid
Sample answer:
Bacteria produce acid / H+ ions.
CHEMISTRY PAPER 3 4541/3
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SPM 2008 Question no. 1
PART 4
Tips to write a good report:
1(i)(i) :Able to compare correctly by referring to
(time frame) / concentration of H+ ions
Sample answer:
The concentrations /number/amount/quantity
of H+ ions in Set I is higher // [vice versa]
CHEMISTRY PAPER 3 4541/3
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PART 4
SPM 2008 Question no. 1
Tips to write a good report:
1(i)(ii) :Able to classify all the four substances
correctly
Sample answer:
Can coagulate
latex
Nitric acid
Methanoic acid
Total marks: 33
CHEMISTRY PAPER 3 4541/3
Cannot coagulate
latex
Potassium hydroxide
Sodium hydroxide
Home
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SPM 2008 Question no. 2
PART 3
Statement 1
Lithium, Li, moves slowly at random on the surface of the water
with a little fizzing.
The water then turns red litmus paper to blue
Statement 2
Sodium, Na, moves rapidly at random on the surface of the
water with a ‘hissing’ sound.
The water then turns red litmus paper to blue.
Statement 3
Potassium, K, moves very rapidly at random on the surface of
the water. It ignites with a lilac flame with a ‘pop’ and a ‘hissing’
sound. The water then turns red litmus paper to blue.
Plan a laboratory experiment to investigate the
reactivity of lithium, sodium and potassium with
water.
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PART 3
SPM 2008 Question no. 2
Tips to write a good report:
a. Aim: Find from the question
Plan a laboratory experiment to investigate the
reactivity of lithium, sodium and potassium with
water.
Sample answer:
To investigate the reactivity of Group 1
elements/lithium, sodium and potassium with
water
CHEMISTRY PAPER 3 4541/3
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PART 3
SPM 2008 Question no. 2
Tips to write a good report:
b. Variables : Always given in the question.
Plan a laboratory experiment to investigate the
reactivity of lithium, sodium and potassium with water.
Sample answer:
Manipulated Variable: Elements of Group 1
Responding Variable : Reactivity
Constant Variable
CHEMISTRY PAPER 3 4541/3
: Temperature /
size of alkali metal
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PART 3
SPM 2008 Question no. 2
Tips to write a good report:
c. Hypothesis: Relationship between the
manipulated variable and the
responding variable with direction.
Sample answer:
(The lower/higher position of metal in) / (going
down/up) Group 1, the more reactive is the metal
in reaction with water.
CHEMISTRY PAPER 3 4541/3
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PART 3
SPM 2008 Question no. 2
Tips to write a good report:
d. List of substances and apparatus:
Complete list of substances and apparatus.
Sample answer:
Substances: Lithium, sodium, potassium, water
Apparatus : Water trough/basin/pale/tray/tank,
knife, forceps, filter paper,
CHEMISTRY PAPER 3 4541/3
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PART 3
SPM 2008 Question no. 2
Tips to write a good report:
e. Procedure : List all the steps correctly
Sample answer:
1. Fill the water trough with water
2. Cut piece of lithium using a knife and forceps
3. Dry the lithium using filter paper
4. Place the lithium on the surface of water
5. Record all the changes / observation
6. Repeat (step 1 to 5) / experiment using
sodium and potassium
CHEMISTRY PAPER 3 4541/3
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PART 3
SPM 2008 Question no. 2
Tips to write a good report:
e. Procedure : List all the steps correctly
Sample answer:
1. Fill the water trough with water
2. Cut piece of lithium using a knife and forceps
3. Dry the lithium using filter paper
4. Place the lithium on the surface of water
5. Record all the changes / observation
6. Repeat (step 1 to 5) / experiment using
sodium and potassium
CHEMISTRY PAPER 3 4541/3
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PART 3
SPM 2008 Question no. 2
Tips to write a good report:
e. Tabulation of data:
Tabulate the data with the following aspects
1. Correct titles
2. Complete list of elements
Responding
Sample answer:
Manipulated
Variable
Max: Score 2
Element
Lithium
Sodium
Potassium
Variable
Observation/Reactivity
HOME
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MASTERING PAPER 3 : THE SCORE
Know to SCORE, sure to MASTER Paper 3
PART 3
MASTERING PAPER 3 : THE SCORE
END OF PART 3
Thank You
KAMAL ARIFFIN BIN SAAIM
SMK DATO’ BENTARA LUAR BATU PAHAT
mel : kamal_ariffin2006@yahoo.com
website: http://kemhawk.webs.com/
e-
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PART 3