MODULEJPN CHAPTER14

8/7/2019 MODULEJPN CHAPTER14

1/14

CHAPTER 14: CHEMICALS FOR CONSUMERS

SECTION A: Common mistake made by the student

Incorrect/Misunderstanding Correct

1. Some students has spelt the process ofthe preparation of soap as safonification

2. Some students has labeled the

hydrocarbon part of the soap molecule ashydrophilic and the anion part as

hydrophobic

3. For paracetamol, they have mention the

brand name which is panadol

The spelling is saponification

The hydrocarbon part is hydrophobic and

anion part is hydrophilic

Name of the medicine is paracetamol

SECTION B: DIAGNOSTIC QUESTION

(a) Objective question

1 Which of the following oils cannot be used to prepare soap?Antara berikut, minyak yang manakah tidak boled digunakan untuk menyediakan sabun

A Palm oilMinyak sawit

B Olive oilMinyak zaitun

C Paraffin oilMinyak parafin

D Coconut oilMinyak kelapa

2 Which of the following is true about soap or detergent?Antara berikut, yang manakah benar tentang sabun atau detergent

A Soap forms scum in soft water

Sabun membentuk kekat dengan air lembutB Detergent forms scum in hard water

Detergent membentuk kekat dengan air liat

C The presence of magnesium ions in detergent forms scumKehadiran ion magnesium dalam detergent membentuk kekat

D Scum decreases the effectiveness of the cleansing action of a soap

Kekat mengurangkan keberkesanan tindakan pencucian sabun

1 | P a g e C h e m i c a l s F o r C o n s u m e r s


2/14

3 Which medicine can relieve a headache?Antara berikut ubat yang manakah dapat menghilangkan sakit kepala?

A Aspirin

Aspirin

B CortisoneKartison

C Barbiturate

Barbiturat

D Streptomycin

Streptomisin

4 The information shows the structural formula of a soap molecule.Maklumat berikut menunjukkan formula struktur molekul sabun

CH3(CH2)14COO- Na+

Which of the following is the name of the anion part of the soap molecule?

Antara berikut yang manakah nama bagi bahagian anion molekul sabun?

A LauricLaurik

B GlycerolGliserol

C PalmitatPalmitat

D Alkylbenzene

Alkilbenzen

5 In the saponification process, sodium chloride is added to the mixture of palm oil and

sodium hydroxide solution toDalam proses saponifikasi, natrium klorida ditambah kepada campuran minyak sawit

dan larutan natrium hidriksida untuk

A speed up the reaction

mempercepatkan tindak balas

B produce a softer soap

menghasilkan sabun yang lebih lembutC reduce the solubility of soap

mengurangkan keterlarutan sabun

D break up the palm oil molecules

memecahkan molekul-molekul minyak



3/14

6 Food additive which are used to slow down the decaying process of food includeBahan tambah makanan yang digunakan untuk melambatkan proses pereputan makanan

termasuklah

I aspartum

aspartum

II benzoic acid

asid benzoic

III sodium nitratenatrium nitrat

IV sulphur dioxide

sulfur dioksida

A I and IV only

I and IV sahajaB II and III only

II and III sahaja

C I,II and IV onlyI,II and IV sahaja

D II, III and IV onlyII, III and IV sahaja

7 Sugar is used to preserve fruits. The preservation action of sugar is due toGula digunakan untuk mengawet makanan. Tindakan gula adalah berdasarkan

A its sweetnesskemanisan

B its dehydrating propertyCiri penyerapan air oleh gula

C its action in slowing down oxidation of oilTindakannya melambatkan pengoksidaan minyak

D its action in slowing down the activity of microorganismTindakannya melambatkan aktiviti bakteria



4/14

8 The following chemical equation shows the reaction between stearate ions

CH3(CH2)16COO- and alkyl sulphate ions, ROSO3

- with calcium ions, Ca2+ in hard water.

R represents the hydrocarbon long chain.Persamaan kimia berikut menunjukkan tindakan diantara ion-ion stearat

CH3(CH2)16COO- dan ion-ion alkyl sulfat ROSO3

- dengan ion-ion kalsium Ca2+ dalam air

liat. R mewakili rantai hidrokarbon.2 CH3(CH2)16COO

- (aq) + Ca2+ (aq) [CH3(CH2)16COO]2Ca(s)2ROSO3

- Na+(aq) + Ca2+(aq) (ROSO3-)2Ca2+(aq) + Na+(aq)

What is the effect of the addition of calcium ion on the concentration of stearate ion

or alkyl sulphate ion?Apakah kesan penambahan ion kalsium ke atas kepekatan ion-ion stearat atau ion-

ion alkyl sulfat?

A The concentration of stearate ion increases

Kepekatan ion stearat bertambah

B The concentration of stearate ion decreasesKepekatan ion stearat berkurang

C The concentration of alkyl sulphate ion increasesKepekatan ion alkyl sulfat bertambah

D The concentration of alkyl sulphate ion decreases

Kepekatan ion alkyl sulfat berkurang

9 A student is stung by an insect with an alkali sting.

Which of the following substances is the most suitable to be applied to the part stung to

treat the student?Seorang pelajar disengat oleh seekor serangga dengan sengat bersifat alkali.

Antara berikut bahan yang manakah paling sesuai untuk digunakan untuk merawatpelajar pelajar tersebut?

A Vinegar

CukaB Ethanol

Etanol

C Toot pasteUbat gigi

D Cooking oil

Minyak masak



5/14

10 The joint of a students leg is swollen and painful.

What medicine is suitable to be given to the student?Sendi kaki seorang pelajar telah bengkak dan dalam keadaan sakit

Apakah ubat yang sesuai untuk diberi kepada pelajar tersebut?

A InsulinInsulin

B Penicillin

Penisilin

C Barbiturate

BarbituratD Paracetamol

Parasetamol

(b) Subjective Question

1. Soap is sodium or potassium salt of long chain fatty acid.Sabun ialah garam natrium atau kalsium daripada asid lemak

(a) State two materials used to prepare soap.Nyatakan dua bahan kimia yang digunakan untuk menyediakan sabun

(i)

(ii) ..

(b) Name the process of production of soap

Namakan proses penyediaan sabun.

(c) State two medium where soap cannot function effectively

Nyatakan dua medium di mana sabun tidak boleh berfungsi dengan

berkesan .

(i)

(ii) ..

2. Detergent is sodium salt of sulphonic acid.

Detergen ialah garam natrium daripada asid sulfonik

(a) Name three materials used to prepare detergentNamakan tiga bahan yang digunakan untuk menyediakan detergen

(i) ...

(ii) ..

(iii)..



6/14

(b) Name an example of detergent.Namakan satu contoh detergen

(c) What is the advantage and the disadvantage of using detergent as cleaningagent?

Apakah kelebihan dan kekurangan menggunakan detergen sebagai agenpencuci

Advantage: Kelebihan

Disadvantage:

Kekurangan

3. Food additives are added to food to enhance the quality of food.Bahan tambah makanan ditambah kepada makanan untuk meningkatkan kualitimakanan

(a) State 3 uses of food additives

Nyatakan 3 kegunaan bahan tambah makanan

1:

2.: .

3: ..

(b) Name the type of food additive that is commonly used toNamakan jenis bahan tambah makanan yang biasa digunakan untuk

(i) prevent food from being oxidisedmengelakkan makanan daripada dioksidakan

..

(ii) make food stay fresh longer.

menjadikan makanan tahan lama

...

(iii) improve the texture of foodmeningkatkan tektur makanan

.



7/14

4. Figure below shows the structure of an incomplete anion part of detergent particle.

CH3 CH2 CH2 CH2 CH2 CH2 CH2 CH2

CH2 CH2 CH2 CH2 CH2 CH2 CH2 + Na+

Question Answer

(a) Complete the anion

part in the space provided

(b) Which part of the

particle is hydrophilic?

Give your reason

(c) Which part of the

particle is hydrophobic?

Give your reason

5. Figure below shows the structure of an incomplete anion part of detergent particle.

CH3 CH2 CH2 CH2 CH2 CH2 CH2 CH2

CH2 CH2 CH2 CH2 CH2 CH2 CH2 + Na+



8/14

Question Answer

(a) Complete the anionpart in the space provided

(b) Which part of the

particle is hydrophilic?

Give your reason

(c) Which part of theparticle is hydrophobic?

Give your reason

6. (a) The effectiveness of the cleansing action of soap is reduced when used in hardwater.

Complete the equation below for the formation of soap scum

CH3(CH2)16COO-

Na+

+ Ca2+

Sodium stearate (Soap)

CH3(CH2)16COO-Na+ + Mg2+ .

Sodium stearate (Soap)

(b) Detergent is more effective than soap in hard water.

Complete the equation below for the formation of soluble salt of detergent

CH3(CH2)10CH2OSO3-Na+ + Ca2+ .

sodium dodecyl sulphate(detergent)

CH3(CH2)10CH2OSO3-Na+ + Mg2+ ..........

sodium dodecyl sulphate(detergent)



9/14

SECTION C: PAPER 2

a) Stuctured Question

(a) Diagram 1.1 shows the set-up of apparatus to prepare soap.Rajah 1 menunjukkan susunan radas untuk menyediakan sabun.

Diagram /Rajah 1.1

(i) Name the process of preparing soap.Namakan proses penyediaan sabun.

[1 mark]

(ii) Name solution P.Namakan larutan P.

[1 mark]

(iii) State the purpose of adding sodium chloride to the reaction mixture

in the experiment.Nyatakan tujuan menambahkan natrium klorida kepada campuran

tindak balas dalam eksperimen itu.

[1 mark]


Heat/Panaskan

Palm oil /Minyak sawit

+ Solution/Larutan P

Distilled water /Air suling

+ Sodium chloride /Natrium klorida

Cool/ Sejukkan

Mixture/Larutan

Soap/Sabun


10/14

(iv) Diagram 1.2 shows the structure of a soap ion.Rajah 1.2 menunjukkan struktur satu ion sabun.

Part /Bahagian X Part/Bahagian Y

DiagramRajah 1.2

Which part is soluble in the water and grease based on

Diagram 1.2?

Bahagian manakah yang larut dalam air dan gris berdasarkanRajah 1.2?

Water/air:..

Grease/gris[[2 marks]

(b) Two cleaning agents,Pand Q,are used to wash clothes in river water and sea

water. Table 1 shows the result obtained.

Dua bahan pencuci, P dan Q digunakan untuk mencuci pakaian

menggunakan air sungai dan air laut. Jadual 1 menunjukkan keputusan yang

diperolehi.

Cleaning agent

Bahana pencuci

River water

Air sungai

Sea water

Air laut

PDoes not form scum

Tidak membentuk kekatForm scum

Membentuk kekat

QDoes not form scum

Tidak membentuk kekat

Does not form scumTidak membentuk kekat


CH2

CH3

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2

C-O-

||

O


11/14

Table 1

Jadual 1

(i) What are the type of cleaning agentsPand Q?

P:

Q:

[2 marks]

(ii) What is the meaning of scum?

Apakah maksud kekat?

[1

mark]

(iii) Name two ions in sea water that cause the formation of scum.

Namakan dua ion dalam air laut yang menyebabkan pembentukan kekat.

1.

2.

[2 marks]

(iv) State one advantage of cleaning agentPcompared to Q.



12/14

Nyatakan satu kelebihan bahan pencuci P berbanding dengan bahan

pencuci Q.

[1

mark]

b) Essay Question

(a) A patients suffered from tuberculosis that caused by a certain bacteria.What type of medicine that can be used to treat the patient ?

Seorangpesakit menghidap batuk kering yang disebabkan oleh bakteria tertentu.Apakah jenis ubat yang boleh digunakan untuk merawat pesakit itu?

Explain why the patient must complete the whole course of the medicine that hisdoctor prescribes to him even if he feels better.

Terangkan mengapa pesakit tersebut mesti menghabiskan semua ubat yang

dipreskripsikan oleh doktor walaupun jika dia berasa sihat.

[5 marks]

(b) Diagram 2 shows the structure of anion parts of a soap and a detergent.

These anions consist of part A and part B as shown in the diagram 2

Diagram 2 menunjukan struktur bagi bahagian anion bagi satu sabun dan satu

detergen.Anion-anion ini terdiri daripada bahagian A dan bahagian B seperti

ditunjukan dalam diagram 2


Anion of a soap

Anion of a detergent


13/14

Part A Part B

Diagram 2

Rajah 2

Name part A and part B of the anions.

State the solubility of part A and part B in the cleansing action.

Namakan bahagian A dan bahagian B dalam anion itu.

Nyatakan keterlarutan bahagian A dan bahagian B dalam tindakan pembersihan.

[4 marks]

(c) The statement below is about soap and detergent.

Pernyataan di bawah adalah tentang sabun dan detergen.

You are given a piece of cloth stained with grease.Anda diberi sehelai kain yang terkena gris.

(i) Describe briefly the experimental procedure, observation and conclusion to

prove the above statement.

Huraikan dengan ringkas prosedur experiment, pemerhatian dan kesimpulan

untuk membuktikan pernyataan di atas. [5 marks]

(ii) Explain how soap works in removing grease from a piece of cloth.

Terangkan bagaimana sabun bertindak dalam menanggalkan gris daripada

sehelai kain.

[6 marks]


The cleaning action of detergent is more

effective than soap in hard water.

Tindakan pencucian detergen lebih berkesandaripada pencucian sabun dalam air liat.


14/14


Documents

MODULEJPN CHAPTER14