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SPM Chemistry Paper 3 2010
1CHEMISTRY PAPER 3 4541/3
Question No. 1
Question No. 2
[Click button to see the question]
Question No. 3
PENSKORAN
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Question no. 1(a)
Score 3: Able to RECORD all the pH value accurately
Experiment I 13.0
Experiment II 13.1
Experiment III 13.0
Sample answer
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Question no. 1(b)
Score 3: Able to state three correct observationwith comparison
Accept: [any correct observation based on laboratory experiment.
Sample answer
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Experiment ObservationI Effervescence / bubbles //
white fumes
II Brighter flame // more (white fumes)/
effervescence than experiment IIIIII Flame/more (white fumes)/effervescence
Notes: Colour of flame is not comparison
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Question no. 1(c)
Score : Able to state three inferences for experiment II
Sample answer
1. Alkaline solution / potassium hydroxide formed
2. Potassium (reacts with water) / (dissolves in water)
3. White fume is potassium oxide
4. The reaction is exothermic // heat is released
5. Potassium is less dense than water
6. Hydrogen gas is released
7. Potassium is more reactive
Note: REJECT AKTIF
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Question no. 1(d)
Score 3: Able to state an idea of hypothesis acuratelySample answer
Going down / up Group1, the reactivity
of metals increases / decreases
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Note: MV + RV + direction
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Question no. 1(f)(i)
Score 3: Able to give the three elements in ascendingorder of reactivity correctly
Sample answer
Lithium, sodium, potassium //
Li, Na, K
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Sample answer
1. Atomic size increases // Atomic radius increases //
The distance between nucleus and valence electronincreases
2. The nuclei attraction // attraction between nucleus and
the valence electron becomes weaker
3. Easier to donate / release / electron
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Question no. 1(f)(ii)
Score 3: Able to give explanation by stating thefollowingthree information
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Question no. 1(d)
Score 3: Able to predictthree observationsbase onlaboratory experiment correctly
Sample Answer
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1. The flame is bigger // Burns more brightly //
produce flame
2. pH value of solution is [13.0 14.0] solution //
[change in indicator colour]
3. Produce more fume // fume // smoke
4. Rubidium floats
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Question no. 2(a)
Score 3: Able to state the three variables correctlySample answer
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Manipulated variable:
Type of solvent/solution // Solvent //
water and methylbenzene
Responding variable:
Presence of effervescence //
Effervescence or no effervescence // Reaction or no reaction
Constant variable:
Type of acid/ethanoic acid // metal/magnesium
(Volume and concentration tidak diterima, kerana tidak
menggangu eksperimen)
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Question no. 2(b)
Score 3: Able to sketch the graph of volume ofhydrogen gas against time
Sample answer
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The graph must have the
following information:
1. The axes are labelled
correctly2. Correct unit
3. Curve shows the
increase in volume
Volume of hydrogen/gas (cm3)
Time (minutes)
X-axis & Y-axis without unit : Score 2Reverse axis, correct shape: Score 2Reverse axis, wrong shape : Score 1
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Question no. 2(c)
Score 3: Able to classify all acids correctly
Sample answer
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Strong Acid Weak acid
Sulphuric acid
Nitric acid
Hydrochloric acid
Ethanoic acid
If state reversible: Score 2
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Question no. 3(a)
Score 2: Able to state the aim of the experiment correctly
Sample answer
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To investigate the effect of catalyst on the rate of
Reaction between metal and acid
If state Problem Statement: Score 1
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Question no. 3(b)
Score 3: Able to state three variables correctly
Sample answer
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Manipulated variable:
The present of catalyst // Catalyst // Copper(II) sulphate
Responding variable:
Rate of reaction //
Total of volume of hydrogen gas evolved per minute/second //
Volume of hydrogen gas evolved at [15-60 seconds]
Constant variable:
Temperature // Volume and concentration of acid //
Concentration of acid // time taken // Mass/size of metal
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Question no. 3(c)
Sample answer
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The presence of catalyst increases the rate of reaction
Score 3: Able to state the relationship between manipulated
variable and responding variable and the directioncorrectly
Catalyst affect the rate of reaction : Score 2
Reverse RV and MV with direction : Score 2
Catalyst affect the reaction : Score 1
Sample answer other than score 3
MV RVdirection
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Question no. 3(d)
Score 3: Able to list complete substances and apparatus
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Burette
Retort stand
and clamp
WaterZinc and
HCl acid
Deliver tube
and stopper
USE DIAGRAM TOVISUALISE THE
PROCEDURE
BasinConical flask
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Question no. 3(d)
Score 3: Able to list complete substances and apparatus
Sample answer
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Substances:
1. Magnesium / zinc
2. [0.1 0.2 mol dm-3 ] / dilute [hydrochloric acid] //
Nitric acid //sulphuric acid
3. Copper(II) sulphate
4. Water
Apparatus:1. Stop watch 4. basin
2. Conical flask 5. retort stand
3. Measuring cylinder 6. delivery tube
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Score 3: Able to state all the step in the procedure correctly
Sample answer
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1. A burette/measuring cylinder is filled with water and
inverted over a basin containing water
2. The initial burette reading is recorded
3. [2-5 g] Zinc/magnesium is placed in conical flask
4. [20-100 cm3 ] [dilute/0.1 mol dm3 ] hydrochloric acid is
added into conical flask
Question no. 3(e)
KEY WORD jangan lupaProcedure:
Ramai calon tak tulis
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Score 3: Able to state all the step in the procedure correctly
Sample answer
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4. [The conical flask is fitted with delivery tube] and
stopwatch is started immediately
5. The burette reading is recorded are recorded at
[10-60 seconds] intervals //
Time taken [20-100 cm3 ] of gas is recorded //
Volume of gas collected [0.5-3 minutes] is recorded6. [2-5 g] Zinc/magnesium is placed in conical flask
7. Step 1 to 6 are repeated by adding copper(II)
sulphate solution into the conical flask
Question no. 3(e)
KEY WORD jangan lupaProcedure:
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Score 3: Able to present a table to record the following
items correctly
Sample answer
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Question no. 3(f)
1. Time (s)
2. Burette reading (cm3 )
3. Volume of gas (cm3 )
4. Minimum three empty columns
Time (s)
Burette reading (cm3 )
Volume of hydrogen gas (cm3 )
Kalau table dilukis sepadan dengan procedure : Score 3
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Thank You
THE END
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