1. 2
SULIT 4541/3
Answer all questions.
Jawab semua soalan.
1 A group of student was carried out an experiment to investigate the effect of
temperature on the rate of reaction. 50 cm3 of sodium thiosulphate solution 0.1
mol dm-3 is poured into a conical flask. The conical flask is placed on the white
paper with the ‘X’ mark. 5.0 cm3 of hydrochloric acid 1.0 mol dm-3 is added into
the conical flask. At the same time the stopwatch is started. The time taken for
the ‘X’ mark to disappear from sight is recorded.
Sekumpulan pelajar menjalankan eksperimen untuk mengkaji kesan suhu ke
atas kadar tindak balas. 50 cm3 larutan natrium tiosulfat 0.1 mol dm3 dituang
ke dalam kelalang kon. Kelalang kon itu diletakkan di atas kertas putih yang
ditanda pangkah ‘X’. 5.0 cm3 asid hidroklorik 1.0 mol dm3 dicampurkan ke
dalam kelalang kon tersebut.Dengan serta merta jam randik dimulakan. Masa
untuk tanda ‘X’ tidak kelihatan dicatatkan.
Diagram 1.1 below shows the view from above of conical flask when the yellow
precipitate of sulphur covered the ‘X’ mark for experiment at the temperature
28oC.
Rajah 1.1 di bawah menunjukkan pandangan dari atas kelalang kon apabila
mendakan kuning sulfur menutupi tanda ‘X’ bagi eksperimen yang dijalankan
pada suhu 28oC.
The yellow
precipitate of
sulphur
Mendakan sulfur
yang berwarna
kuning
At 0 second At 43 second
Pada 0 saat Pada 43 saat
Diagram 1.1
Masa 0 Rajah 1.1 Masa 0 saat
saat Masa 0 saat
Masa 0
saat Masa 0 saat
The experiment is repeated used the sodium thiosulphate solution at temperature
Masa 0 saat
35oC, 45oC, 55oC and 65oC.
Experiment diulangi dengan menggunakan larutan natrium tiosulfat pada suhu
35oC, 45oC, 55oC dan 65oC.
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2. 3
SULIT 4541/3
For
Diagram 1.2 shows the readings of the stopwatch for each set at different examiner’s
use
temperatures.
Rajah 1.2 menunjukkan bacaan jam randik bagi setiap tindak balas pada suhu
berlainan.
At 350C At 450C
Pada 350C: ………….. s Pada 450C : ………….. s
At 550C At 650C
Pada 550C : ………….. s Pada 650C: ………….. s
Diagram 1.2
Rajah 1.2
Rajah 1.2
(a) Record the time taken for each reaction in the spaces provided. 1(a)
Catatkan masa bagi setiap tindak balas pada ruang yang disediakan.
[3 marks]
3
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SULIT

3. 4
SULIT 4541/3For
examiner’s
o o use
(b) Construct a table and record the temperature starts from 28 C until 65 C , time
1
and for this experiment.
time
Bina satu jadual dan rekodkan suhu bermula 28oC sehingga 65oC, masa dan
1 1(b)
dalam eksperimen ini.
masa
[3 marks]
3
1
(c) Plot a graph of temperature against on the graph paper provided on the
time
page 5.
1
Lukiskan graf suhu melawan pada kertas graf yang disediakan di muka 1(c)
masa
surat 5.
[3 marks]
3
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4. 5
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Question 1 (c)
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5. 6
SULIT 4541/3
For
examiner’s
(d) Based on the graph in (c), state the relationship between the rate of reaction use
and temperature.
Berdasarkan graf di (c), nyatakan hubungan di antara kadar tindak balas
dengan suhu.
…………………………………………………………………………………
1(d)
…………………………………………………………………………………
[3 marks]
(e) For this experiment state: 3
Bagi eksperimen ini nyatakan:
(i) The manipulated variable:
Pemboleh ubah di manipulasikan:
………………………………………………………………………….
(ii) The responding variable:
Pemboleh ubah bergerak balas:
…………………………………………………………………………..
(iii) The constant variable:
Pemboleh ubah dimalarkan: 1(e)
…………………………………………………………………………..
[3 marks] 3
(f) Based on this experiment, state the operational definition for the rate of
reaction.
Berdasarkan eksperimen ini, nyatakan definisi secara operasi bagi kadar
tindak balas.
………………………………………………………………………………………………..
1(f)
………………………………………………………………………………………………..
[3 marks]
3
Total 1
18
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6. 7
SULIT 4541/3
2 An experiment was carried out to construct the electrochemical series based the
ability of a metal to displace another metal from its salt solution.
Satu eksperimen telah dijalankan untuk membina siri elektrokimia berdasarkan
kebolehan sesuatu logam menyesarkan logam lain daripada larutan garamnya.
Diagram 2.1 shows the set-up of apparatus for the experiment.
Rajah 2.1 menunjukkan susunan radas bagi eksperimen tersebut.
Test tube At the beginning After 10 minutes
Tabung uji Awal Selepas 10 minit
Copper(II) Copper(II)
sulphate solution sulphate solution
(blue colour) (light blue)
Larutan Larutan Metal X
A Metal X
kuprum(II) sulfat kuprum(II) sulfat Logam X
(biru) Logam X
(biru pudar)
Brown solid
Pepejal perang
Magnesium Magnesium
sulphate solution sulphate solution
Larutan Larutan
B
magnesium Metal X magnesium Metal X
sulfat Logam X sulfat Logam X
Copper(II) Copper(II)
sulphate solution sulphate solution
(blue colour) (light blue)
Larutan Magnesium Larutan Magnesium
C
kuprum(II) sulfat ribbon kuprum(II) sulfat ribbon
(biru) Pita (biru pudar) Pita
magnesium magnesium
Brown solid
Pepejal perang
Diagram 2.1
Rajah 2.1
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7. 8
SULIT 4541/3
For
(a) Write the observation for test tube A, B and C in Table 2.1. examiner’s
use
Tuliskan pemerhatian bagi tabung uji A, B dan C dalam Jadual 2.1.
Test tube Observation
Tabung uji Pemerhatian
A
B
C
Table 2.1 2(a)
Jadual 2.1
[ 3 marks]
3
(b) State the inference from the observation in test tube A.
Nyatakan inferens berdasarkan pemerhatian dalam tabung uji A.
…………………………………………………………………………………
2(b)
…………………………………………………………………………………
[ 3 marks] 3
(c) Based on the observations in the experiment, arrange all the metals in
descending order of their electropositivity.
Berdasarkan pemerhatian-pemerhatian dalam eksperimen, susunkan semua
logam dalam keelektropositifan menurun.
2(c)
…………………………………………………………………………..………
[3 marks] 3
(d) If metal X in test tube A is replaced by silver metal, predict the observation for
the intensity of blue colour of copper(II) sulphate, CuSO 4 solution.
Jika logam X dalam tabung uji A digantikan dengan logam argentum,
ramalkan pemerhatian bagi keamatan warna biru larutan kuprum(II) sulfat, 2(d)
CuSO4.
…………………………………………………………………………..…… 3
[3 marks]
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8. 9
SULIT 4541/3
For
(e) examiner’s
Tin, Sn Aluminium, Al use
Stanum, Sn Aluminium , Al
Lead, Pb Iron, Fe
Plumbum, Pb Ferum, Fe
Classify the following metals into more electropositive than metal X and less
electropositive than metal X.
Kelaskan logam-logam berikut kepada lebih elekropositif daripada logam X
dan kurang elektropositif daripada logam X.
More electropositive Less electropositive
Lebih elektropositif Kurang elektropositif
2(e)
[3 marks]
3
Total 2
15
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9. 10
SULIT 4541/3
3
Acids only show their acidic properties when they are dissolved in water.
Asid hanya menunjukkan sifat keasidannya apabila dilarutkan ke dalam air.
Based on the statement, plan a laboratory experiment to investigate the role of
water in showing the properties of acid.
You are given the glacial ethanoic acid and magnesium ribbon.
Berdasarkan pernyataan tersebut, rancang satu eksperimen dalam makmal
untuk mengkaji peranan air dalam menunjukkan sifat asid.
Anda dibekalkan asid etanoik glasial dan pita magnesium.
Your planning must include the following items:
Perancangan anda hendaklah mengandungi perkara-perkara berikut:
(a) Statement of the problem
Pernyataan masalah
(b) All the variables
Semua pembolehubah
(c) Statement of the hypothesis
Pernyataan hipotesis
(d) List of materials and apparatus
Senarai bahan dan radas
(e) Procedure of the experiment
Prosedur eksperimen
(f) Tabulation of data
Penjadualan data
[ 17 marks ]
END OF QUESTION PAPER
KERTAS SOALAN TAMAT
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SULIT