Spm Percubaan 2008 Mrsm Chemistry Paper 3

Name : …….……………………………………...…….…

Class : ……………..

CONFIDENTIAL 4541/3 Chemistry Paper 3 September 2008 1½ hours

MAKTAB RENDAH SAINS MARA SIJIL PELAJARAN MALAYSIA TRIAL EXAMINATION 2008 CHEMISTRY Paper 3 One hour and thirty minutes

DO NOT OPEN THIS QUESTION BOOKLET UNTIL BEING TOLD TO DO SO

For Examiner’s Use 1.

Write down your name and class in the space provided Tuliskan nama dan kelas anda pada ruang yang disediakan.

2.

The question booklet is bilingual.

Question

Full Mark

1

33

2

17

Total

50

Mark

Buku soalan ini adalah dalam dwibahasa.

3.

Candidates are required to read the information at the back page of the question booklet. Calon dikehendaki membaca maklumat di halaman belakang kertas soalan ini.

This question booklet contains 10 printed pages including the front page. [See Next Page 4541/3©Copyright Reserve MARA

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An experiment was conducted to determine the position of different metals in Electrochemical Series. Diagram 1.1 shows the set-up of apparatus used and copper is the positive terminal in all experiment. Satu eksperimen dijalankan untuk menentukan kedudukan logam berbeza dalam Siri Elektrokimia. Rajah 1.1 menunjukkan susunan radas yang digunakan dan kuprum adalah terminal positif dalam semua eksperimen.

Porous pot

0.5 mol dm-3 copper(II) sulphate

Pasu berliang

kuprum sulfat

Magnesium 0.5 mol dm-3 magnesium sulphate

Copper Kuprum

magnesium sulfat

Diagram 1.1 Rajah 1.1

Experiment is repeated using different pairs of metals. Diagram 1.2 shows the voltmeter reading for all experiments. Eksperimen diulangi menggunakan pasangan logam berbeza. Rajah 1.2 menunjukkan bacaan voltmeter bagi semua eksperimen.

Mg / Cu

Fe / Cu

Reading:.......................... V

Reading:.......................... V

Bacaan:

Bacaan:

Zn / Cu

Pb / Cu

1(a) Reading:.......................... V

Reading:.......................... V

Bacaan:

Bacaan:

Diagram 1.2 Rajah 1.2

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(a)

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Record the voltmeter readings in the spaces provided. Catatkan bacaan voltmeter pada ruang yang disediakan.

(b)

Construct a table and record the potential difference for each experiment. Bina sebuah jadual untuk menunjukkan beza keupayaan bagi setiap eksperimen .

1(b)

(c)

Complete the Table 1.1 based on the experiment Lengkapkan Jadual 1.1 berdasarkan eksperimen itu.

The way to manipulate variable: Cara mengubah pembolehubah dimanipulasikan:

What to observe in the responding variable: Apa yang diperhatikan dalam pembolehubah bergerakbalas

The way to maintain the controlled variable:

1(c)

Cara menetapkan pembolehubah dimalar.

Table 1.1 Jadual 1.1

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(d)

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State the hypothesis for this experiment. Nyatakan hipotesis bagi eksperimen ini

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

1(d)

........................................................................................................................ (e)

Cell in Diagram 1.1 is left for 5 minutes. Complete the following Table by stating the observations and related inferences in the experiment. Sel dalam Rajah 1.1 dibiarkan selama 5 minit. Lengkapkan Jadual berikut dengan menyatakan pemerhatian dan inferens yang berkaitan dalam eksperimen tersebut.

Observations

Inferences

Pemerhatian

Inferens

1(e)

(f)

Based on the observations, arrange all the metals in ascending order of their electropositivity Berdasarkan pemerhatian, susun kesemua logam itu mengikut tertib menaik keelektropositifan

1(f)

........................................................................................................................ (g)

Based on the cell in Diagram 1.1, classify the ions present in both solutions into cations and anions. Berdasarkan sel dalam Rajah 1.1 kelaskan ion-ion yang terdapat dalam kedua-dua larutan kepada kation dan anion.

1(g)

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(h)

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State the operational definition of a chemical cell. Nyatakan definisi secara operasi bagi sel kimia

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

1(h)

........................................................................................................................ (i)

A potential difference of 1.5 V is observed when the experiment is repeated by using an unknown metal, R and copper. Predict the position of metal R in the Electrochemical Series. Beza keupayaan sebanyak 1.5 V dihasilkan apabila eksperimen diulangi menggunakan suatu logam yang tidak diketahui , R dan kuprum. Ramalkan kedudukan logam R dalam Siri Elektrokimia.

1(i) ........................................................................................................................ (j)

If cell using Zn/Cu is left for 2 hours, state the colour change of copper(II) sulphate solution. Sekiranya sel menggunakan Zn/Cu dibiarkan selama 2 jam, nyatakan perubahan warna larutan kuprum(II) sulfat.

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

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1(j)

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Diagram 2.1 shows two types of bonfire using sticks and logs. Rajah 2.1 menunjukkan 2 jenis unggun api menggunakan ranting kayu dan batang kayu.

During camping, a group of students discovered that it is easier to start a bonfire using sticks rather than logs. This is due to the differences in the size Semasa berkhemah, sekumpulan pelajar telah mendapati bahawa lebih senang untuk menghidupkan unggun api menggunakan ranting kayu berbanding batang kayu. Ini disebabkan oleh perbezaan saiz.

Bonfire using logs

Bonfire using sticks

Unggun api menggunakan batang kayu

Unggun api menggunakan ranting

Diagram 2.1 Rajah 2.1

Referring to the above situation, plan a laboratory experiment to investigate the effect of size of reactant on the rate of reaction between calcium carbonate and an acid. Merujuk kepada situasi di atas, rancangkan satu eksperimen dalam makmal untuk mengkaji kesan saiz bahan tindak balas terhadap kadar tindak balas antara kalsium karbonat dengan asid.

Your planning should include the following: Perancangan anda haruslah mengandungi perkara-perkara berikut :

(i)

Statement of Problem Pernyataan masalah

(ii)

All the variables Semua pembolehubah

(iii)

Statement of hypothesis Pernyataan hipotesis

(iv)

List of substances and apparatus Senarai bahan dan alat radas

(v)

Procedure of the experiment Prosedur eksperimen

(vi)

Tabulation of data Penjadualan data

[17 marks] END OF QUESTION PAPER [Kertas Soalan Tamat]

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SPACE FOR YOUR ANSWERS / RUANG JAWAPAN ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..……..

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SPACE FOR YOUR ANSWERS / RUANG JAWAPAN ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..…….. ………………………………………………………………………………………..……..

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4541/3 INFORMATION FOR CANDIDATES MAKLUMAT UNTUK CALON

1.

This question paper consists of two questions. Answer all questions. Kertas soalan ini mengandungi dua soalan. Jawab semua soalan

2.

Write your answers for Question 1 in the spaces provided in the question paper. Tuliskan jawapan bagi Soalan 1 dalam ruang yang disediakan dalam kertas soalan.

3.

Write your answers for Question 2 on the lined pages at the end of the question paper in detail. Tuliskan jawapan bagi Soalan 2 pada halaman bergaris di bahagian akhir kertas soalan ini dengan terperinci

4.

Show your working, it may help you to get marks. Tunjukkan cara mengira kerana ia boleh membantu anda mendapatkan markah.

5.

If you wish to cancel any answer, neatly cross out the answer. Sekiranya anda hendak membatalkan sesuatu jawapan, buat garisan di atas jawapan itu.

6.

The diagrams in the questions are not drawn to scale unless stated. Rajah yang terdapat dalam soalan tidak dilukis mengikut skala kecuali dinyatakan sebaliknya

7.

Marks allocated for each question or part of the question are shown in brackets. Markah yang diperuntukkan bagi setiap soalan atau ceraian soalan ditunjukkan dalam kurungan.

8.

The time suggested to complete Question 1 is 45 minutes and Question 2 is 45 minutes. Masa yang dicadangkan untuk menjawab Soalan 1 ialah 45 minit dan Soalan 2 ialah 45 minit.

9.

You may use a non-programmable scientific calculator. Anda dibenarkan menggunakan kalkulator saintifik yang tidak diprogramkan.

10.

Hand in all your answer sheets at the end of the examination. Serahkan semua kertas jawapan anda di akhir peperiksaan.

Marks awarded Pemberian markah

Score Skor 3

Description Penerangan Excellent : The best response

2

Satisfactory : An average response

1

Weak : An inaccurate response

0

No response or wrong response

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Cemerlang : Respons yang paling baik Memuaskan

: Respons yang sederhana

Lemah : Respons yang kurang tepat Tiada respons atau respons yang salah

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