spm percubaan 2007 mrsm chemistry paper 3

8/14/2019 SPM Percubaan 2007 MRSM Chemistry Paper 3

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CONFIDENTIAL

ChemistryPaper 3

September

2007

1 jam

SPM TRIAL EXAMINATION 2007

MAKTAB RENDAH SAINS MARA

CHEMISTRYPaper 3

One hour and thirty minutes

DO NOT OPEN THIS QUESTION BOOKLET

UNTIL BEING TOLD TO DO SO

1. Write yourname, index number and class

in the space provided.

2. This question booklet is bilingual.

3. The question is in English followed by the

Malay version.

4. Candidate is required to read the

instruction on page 2.

For Examiners Use

QuestionFull

Mark

Obtained

Mark

1 33

2 17

Total 50

This question booklet contains 13 printed pages.

INFORMATION FOR CANDIDATESCONFIDENTIAL4541/3 2007 Hak Cipta MARA


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INFORMATIONFORCANDIDATES[MAKLUMAT UNTUK CALON]

1. This question paper consists of two questions. Answerall questions.

[Kertas soalan ini mengandungi dua soalan. Jawab semua soalan]

2. Write your answers forQuestion 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 andQuestion 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]Description [Penerangan]

3Excellent : The best response

[Cemerlang] : [Respons yang paling baik]

2Satisfactory : An average response

[Memuaskan] : [Respons yang sederhana]

1Weak : An inaccurate response

[Lemah] : [Respons yang kurang tepat]

0 No response or wrong response[Tiada respons atau respons yang salah]


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1 An experiment is carried out to determine the end point of a neutralisation process.

50.00 cm3 of aqueous potassium hydroxide 0.1 mol dm-3 is titrated against

hydrochloric acid with an unknown concentration using phenolphthalein as an

indicator.

The titration is repeated twice. Diagram 1.1 shows the results of the experiment.

[Satu eksperimen telah dijalankan untuk menentukan takat akhir bagi proses peneutralan. 50.00 cm3

larutan kalium hidroksida 0.1 mol dm-3

dititratkan dengan asid hidroklorik yang kepekatannya tidak

diketahui dengan menggunakan penunjuk fenolftalein.

Pentitratan diulang sebanyak dua kali. Rajah 1.1 menunjukkan keputusan eksperimen.]

Titration Set

[Set Titratan]

1 2 3

Initial Burette

Reading

[Bacaan Awal

Buret]

cm3 cm3

cm3

Final Burette

Reading

[Bacaan akhir

buret]

cm3 cm3 cm3

DIAGRAM 1.1

[RAJAH 1.1]

For

Examiners

Use

[Untuk

Kegunaan

Pemeriksa]


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(d) (i) What is the average volume of hydrochloric acid used in the experiment?[Berapakah purata isipadu asid hidroklorik yang digunakan dalam eksperimen ini?]

(ii) The chemical equation for the reaction is :

[Persamaan kimia bagi tindak balas ini ialah:]

Determine the concentration of hydrochloric acid used.[Tentukan kepekatan asid hidroklorik yang digunakan.]

[3 marks]

For

Examiners

Use

[Untuk

Kegunaan

Pemeriksa]

1(d)

KOH + HCl KCl + H2O


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(e) The experiment is repeated using sulphuric acid to replace hydrochloric acid.

It was found that the volume of sulphuric acid required is half the volume of

hydrochloric acid used.

State the inference of this observation.[Eksperimen ini diulang dengan menggunakan asid sulfurik untuk menggantikan asid hidroklorik.

Didapati isipadu asid sulfurik yang diperlukan adalah separuh daripada isipadu asid hidroklorik yang

digunakan.

Nyatakan inferens bagi pemerhatian ini]

.

..

[3 marks]

(f) Potassium chloride which is produced in this experiment is an example of a soluble

salt.

Classify the following substances into soluble and insoluble salt.[Garam yang terhasil dalam eksperimen ini ialah kalium klorida, sejenis garam terlarutkan. Kelaskan

bahan bahan berikut kepada garam terlarutkan dan garam tak terlarutkan.]

[3 marks]

1(f)

For

Examiners

Use

[Untuk

Kegunaan

Pemeriksa]

1(e)

Substances

[Bahan bahan]

Sodium sulphate Lead(II) iodide Barium sulphate

[Natrium sulfat] [Plumbum(II) iodide] [Barium sulfat]

Magnesium nitrate Zinc carbonate Silver chloride

[Magnesium nitrat] [Zink karbonat] [Argentum klorida]


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(g) Diagram 1.2 shows three test tubes containing potassium hydroxide solution with

different concentrations and pH values.[Rajah 1.2 menunjukkan tiga tabung uji yang mengandungi larutan kalium hidroksida pada kepekatan

dan nilai pH yang berbeza.]

Test tube

[Tabung uji]1 2 3

Concentration[Kepekatan]

pH value

[Nilai pH]

13 12 11

DIAGRAM 1.2

[RAJAH 1.2]

Based on Diagram 1.2,[Berdasarkan Rajah 1.2,]

(i) Give the operational definition for the pH value of an alkali.[Berikan definisi secara operasi bagi nilai pH untuk suatu alkali]

.

.

[3 marks]

For

Examiners

Use

[Untuk

Kegunaan

Pemeriksa]

0.1mol dm-3potassium hydroxide

[kalium hidroksida]

0.01mol dm-3

potassium hydroxide

[kalium hidroksida]

0.001 mol dm-3

potassium hydroxide

[kalium hidroksida]

1(g)(i)


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(ii) Predict the pH value if the concentration of potassium hydroxide solution is

0.0001 mol dm-3.[Ramalkan nilai pH bagi larutan kalium hidroksida yang berkepekatan 0.0001 mol dm

-3.]

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

[3 marks]

(iii) As the concentration of the potassium hydroxide solution changes, the pH value

also changes. Explain why.[Apabila kepekatan larutan kalium hidroksida berubah, didapati nilai pH juga berubah.

Terangkan mengapa.]

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

[3 marks]

(iv) State the variable involved in this experiment.[Nyatakan pembolehubah yang terlibat dalam eksperimen ini.]

Manipulated variable: .[Pembolehubah yang dimanipulasikan]

Responding variable: .[Pembolehubah yang bergerakbalas]

Controlled variable: ...[Pembolehubah yang dimalarkan]

[3 marks]

(v) State the hypothesis for this experiment.[Nyatakan hipotesis bagi eksperimen ini.]

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

[3 marks]

For

Examiners

Use

[Untuk

Kegunaan

Pemeriksa]

1(g)(ii)

1(g)(iii)

1(g)(iv)

1(g)(v)


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2 Equal volume of water is heated in two different kettles by a scout during camping.

Kettle 1 is heated by using alcohol X while kettle 2 is heated by using alcohol Y as

shown in Diagram 2. The size and type of both kettles are the same.[Semasa perkhemahan, seorang pengakap telah memanaskan air yang mempunyai isipadu yang

sama dalam dua cerek berlainan Cerek 1 dipanaskan dengan alkohol X manakala cerek 2

dipanaskan dengan alkohol Y seperti ditunjukkan dalam Rajah 2. Saiz dan jenis kedua dua cerek

adalah sama.]

DIAGRAM 2

RAJAH 2

It was discovered that the mass of alcohol X needed to boil the water is more

compared to alcohol Y.[Didapati jisim alkohol X yang diperlukan untuk mendidihkan air lebih besar berbanding alkohol Y.]

Plan a laboratory experiment to compare the heat of combustion between alcohol X

and Y based on the above situation.[Berdasarkan kepada situasi di atas, rancangkan satu eksperimen makmal untuk membandingkan

haba pembakaran antara alkohol X dan Y.]

Your planning should include the following aspects:[Perancangan anda haruslah mengandungi aspek berikut :]

(a) Problem statement [Pernyataan masalah]

(b) All the variables [Semua pembolehubah](c) Statement of hypothesis [Pernyataan hipotesis]

(d) List of substances and apparatus [Senarai bahan dan alat radas]

(e) Procedure of the experiment [Prosedur eksperimen]

(f) Tabulation of data [Penjadualan data]

[17 marks]

END OF QUESTION PAPER[KERTAS SOALAN TAMAT]

Kettle 1

[Cerek 1]

Kettle 2

[Cerek 2]


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ForExaminers

Use[Untuk

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Pemeriksa]

SPACE FOR YOUR ANSWERS / RUANG JAWAPAN

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spm percubaan 2007 mrsm chemistry paper 3

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