2008 Kedah Spm Chemistry3

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454113

454113 Kimia Kertas3

Sept. 2008

No. Kad Pengenalan:

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Angka Giliran:

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Nama:

Tingkatan:

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PERSIDANGAN KEBANGSAAN PENGETUA-PENGETUA SEKOLAH MENENGAH NEGERI KEDAH DARUL AMAN

PEPERIKSAAN PERCUBAAN SPM 2008 CHEMISTRY

Paper 3

One hour and thirty minutes

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DffiERITAHU

1. Kertas soalan ini adalah da/am dwibahasa. 2. Soalan dalam Bahasa Inggeris meildahuIui soalan yang sepadan da/am Bahasa Me/ayu. 3. Calon dibenarkan menjawab leese/uruhan atau sebahagiansoalan sama ada da/am Bahasa Inggeris atau Bahasa Me/ayu.

4. Calon dileehendald membaca maklumatdi halaman belakangkertas

Untuk Keguriaan Pemeriksa

Soalan

Markah Markah' penuh diperoleh

1

33

2

17

JUMLAH

soa/an ini.

Kertas soalan ini mengandungi 10 halaman bercetak

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INFORMATION FOR CANDIDATES 1. This question paper consists oftwo questions. Answer all the questions. 2. Write your answers for Question J and Question 2 in the spaces provided in the question paper. 3. You may use equations, diagrams, tables, graphs and other suitalJle methods to . explain your answer. 4. If you wish to cancel any answer, neatly cross out the answer. Then write down the new answer. 5. Show your working. It may help you to get marks. 6. The diagrams in the questions are not drawn to scale unless stated 7. Marks allocatedfor each question or part ofthe question are shown in brackets. 8. The time suggested for answering Question 1 is 45 minutes and Question 2 is 45 minutes. 9. You may use a non-programmable scientific calculator. 10. Hand in all your answer sheets at the end ofthe examination.

Marks awarded:

Mark

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3

Description Excellent: The best response

2

Satisfactory : An average response

1

Weak: An inaccurate response

0

No response or wrong response

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Answer all the questions.

Jawab SenllUl soalan.

The timesuggested for answering Question 1 is 45 minutes. Masayang dicadangkan untulc menjawab Soalan 1 ialah 45 minit.

1 A student carried out an experiment to construct the electrochemleal series by measuring the voltage of copper and metal T in a simple voltaic cell as shown in Diagram 1.1. The experiment is repeated by replacing metal T with metals P, Q, R and

S. Seorang pelajar telah menjalankan suatu elrperimen untuk membina siri elektrokimta

dengan mengukur voltan antara logam kuprum dan logam T dalam sebuah sel

. ring/cas seperti yang ditunjulclran dalam Rajah 1.1. Ekperimen itu diulang beberapa

/rali dengan menggantikan logam T dengan logam P, g, R dan S.

T Copper(II) sulphate solution Larutan kuprum(ll) sulfat

DIAGRAM 1.1 RAJAH 1.1 The voltmeter readings for each pair of metals are shown in Diagram 1.2 Bacaan voltmeter bagi setiap pasangan logam ditunjulckan dalam Rajah 1.2

Cu andQ

Cu and P

Cuand T

Cu and S

DIAGRAM 1.2

RAJAH 1.2 4541/3

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(a) Based on Diagram 1.2, record the voltmeter readings for each pair of metals in Table 1.1. Berdasarkan Rajah 1.2. rekodkan bacaan voltmeter bag; setiap pasangan logam dalam Jadual 1.1.

Pair of metals

Negative terminal

Voltage/V

Pasangan logam

Terminal negatif

Voltanl V

Cuand P

P

Cuand Q

Q

Cu and R

Cu

Cu and S

S

Cuand T

Cu TABLE 1.1 JADUAL 1.1

[3 mara]

(b) Based on the voltmeter readings, arrange the metals Cu, P, Q, R, Sand Tin descending order ofelectropositivity. Berdasarkan bacaan voltmeter, susun logam-logam cu. P, Q, R, S dan T dalam tertib keelektropositifan logam secara menurun.

Descending order of electropositivity of metal, Susunan keelektropositifan logam secara menurun.

[3 mara]

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(c) Complete Table 1.2 for the experiment.

Leng1cap1can Jadual 1.2 bag!experiment inf.

Variables Pembolehubah (i) Manipulated variable: Pembolehubah dimanipulasi:

Action to be taken Tindakan .,anl! Derlu diambU (i) The way to manipulate variable: Cara pembolehubah dimanjpulasi1can:

.................................................................. .................................................................. .(ii) Responding variable:

Pembolehubah bergerakbalas:

(ii) What to observe in the responding variable: Apa yang diperhatiJran poda

pembolehubah bergerakbalas:

(iii) Controlled variable: Pembolehubah dimalarkan:

(iii) The way to maintain the controlled

variable: Cara untuk menetapkan pembolehubah yang dimalarkan:

TABLE 1.2 JADUAL 1.2

[6marh]

(d) State a hypothesis for this experiment.

Nyatakan satu hipotesis untuk eksperimen ini.

[3 maries]

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(e) State three observations and corresponding inferences that can be obtained from the cell in Diagram 1.1(Cu and metal T).

Nyatakan tiga pemerhatian dan inferens yang sepadan yang boleh diperoleh. dartpada sel dalam Rajah 1.1(eu dan logam T). Observation

Inference Interens

Pemerhatian I

" " " " " " """"" " "" " " " " " . "" "" """ "" " " "" " "" """" ""

..

]

"" . "" "" . """" ,," " ...... "" " .... " ""

.......... " . " .... "" . ":,,

..

•..........................•.•••.....••.••.•..

..•...•..•.......••..•..•.••••.•.•••••........

...... " " " .... " " .. " ..... "" .. " " . " "" " " . " . " . " ......

..•.......•....................•..••.•••••.•..

2 •...................•..•.........••.......•.

2 •...•..............•...•..•......•.....•....

.... " "" " . " ........ " """" " " .... "" " . "" " .... "

...............•.......••..........•••........

................................

..............••••......•............•......••

3 .•...•.....••••...•......•.•..•.......•..•..

3 ............................................

.................. ...•....•.••.....••..••••..

.•••.•....•.•....•....•.•..•....•.••.•.••.....

.••.••..•.••...••.••...••..•...•..••••......•.

.•.•.......••....•..•.•.•....•••...•.••..••.•.

..

"" " " "" " " ""

""" " . " " "" . "" " "" ""

.... "" " "" " . "" "

~

[6 mara]

(1) Predict the voltage ofthe cells which contain the following pair of metals. Ramalkan voltan sel yang memJJ!lnyai pasanganlogam yang beriku:

Pair of metals

Voltagel V

PtlSangan logam

VoltanIV

PandS PandT QandR

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(g) Classify metals P, Q, R, S and T into more electropositive than copper and less electropositive than copper. Write your answers in the table provided. Kelaskan logam-logam P. Q. R, S dan T kepada yang lebih eleksropositif daripada kuprum dan kurang elekiropostttfdaripada kuprum. Tuliskan jawapan anda dalam jadual yang disediakan.

[3 marks] (h) Explain why the voltage of cell consist of copper and metal S is larger than the cell consist of copper and metal P. Terangkan mengapa nilai voltan sel yang mengandungi kuprum dan logam S lebih besar daripada selyang mengandungi kuprum dan logam P.

..... .

. ..

..,.

"

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[3 marks] . . . (i) Another example of a chemical cell is Daniell Cell. Draw the apparatus set-up of a Daniell Cell consisting copper and metal T. Contoh lain bagi satu sel kimia ialah Sel Daniell. Lukiskan susunan radas bag; satu Sel Daniell yang mengandungi kuprum dan logam T.

[3 marh]

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2. Lithium. sodium and potassium are three elements in Group I of the Periodic Table. These three elements show different reactivity in their reactions with water. Litium, natrium dan kalium adalah tiga unsur Kumpulan J dalam Jadual Berkala.

Tiga unsur int menunjukan kereaktifan berbezadalam tindak balas dengan air. Plan an experiment to compare the reactivity of these three elements when reacting with water.

Rancang saw eksperimen untuk membandingkan kereaksifan ketiga-tiga unsur tersebut apabila bertindak balas dengan air. Your planning must include the following items:

Perancangan anda haruslah mengandungiaspek berikut: (a) Problem statement

Pernyataanmasaalah (b) Hypothesis

Hipotesis (c) All the variables

Semua pembolehubah (d) Lists of materials and apparatus

Senarai bahan dan alat rodas (e) Procedure

Prosedur (t) Tabulation of data

Penjadualan data [17 marks]

END OF QUESTION PAPER

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