SPM2004-01 Pemerhatian/ Inferences/ · 2019-11-15 · (b) Determine the empirical formula of lead oxide. Given the relative atomic mass of Pb = 207 and O = 16 Tentukan empirikal formula

Modul Pecutan Akhir SPM 2019 Bengkel Kimia Bersama Cikgu Adura

Copyright @Adura muka surat 1

SPM2004-01 (a)

Pemerhatian/ Observations Inferences/ Inferences

1. Wasap putih terbebas/

white fume released

2. Jisim kandungan mangkuk pijar bertambah/ mass increases

3. Pepejal/ serbuk putih terbentuk / white solid produce/ formed

4. Nyalaan putih/ terang/ berkilau //

burn brightly

Magnesium oksida terbentuk/ MgO formed Magnesium berpadu / bertindak balas dengan oksigen / Magnesium react with oxygen Magnesium teroksida/ dioksidakan Magnesium oxidized

(b) Jisim mangkuk pijar dan penutup : 25.35 g Jisim mangkuk pijar, penutup dan magnesium : 27.75 g g The mass of crucible, lid and magnesium oxide when cooled : 29.35 g g (c) (i) (ii) Jisim magnesium: 27.75 -25.35 = 2.40/ 2.4 g

Jisim oksigen: 29.35 – 27.75 = 1.60/ 1.6 g

(iii) Langkah menentukan formula empirik magnesium oksida:

L1: Mol magnesium: 24

4.2 = 0.1

Mol oksigen: 16

6.1 = 0.1

L2: Nisbah Mg : O = 1:1

L3: Formula empirik = MgO

(d) 1 mol magnesium react with 1 mol oxygen 1 mol magnesium bertindak balas dengan 1 mol oksigen …………………….……………………………………………………………………………………… [3M]

SPM2012-01 (a) (i) Thermometer reading increases// temperature rises// volume of mercury increases// level of mercury increases// mercury expands Bacaan termometer bertambah// suhu meningkat// isi padu merkuri bertambah// paras merkuri bertambah// merkuri mengembang ……………………………………………………………………………………………………….[3M] (ii) Mercury/ water absorbs heat// exothermic// heat released // heat produced Merkuri/ air menyerap haba // eksotermik// haba dibebaskan// haba dihasilkan ……………………………………………………………………………………………………….[3M]



(b)

Konduktor haba yang baik Good heat conductor

Konduktor haba yang lemah Poor heat conductor

Tungku kaki tiga besi Iron tripod stand Penghadang angin aluminium Aluminium wind shield

Lampu kaca Glass Lamp

Air Water

(c) The higher the number of carbon atoms per molecule of alcohol, the higher the heat of combustion Lebih tinggi bilangan atom karbon per molekul alkohol, lebih tinggi haba pembakaran ……………………………………………………………………………………………………….[3M]

(d) (i) Pemboleh ubah dimanipulasikan: alkohol/ alcohol [Nama alkohol] Manipulated variable (ii) Pemboleh ubah bergerak balas: Heat of combustion// haba pembakaran Responding variable (iii) Pemboleh ubah dimalarkan: : Isi padu air/ Tin kuprum// perubahan suhu Fixed variable: volume of water/ copper can// temperature change

[3M] (e)

Alkohol Alcohol

Isi padu air

Volume of water (cm3)

Perubahan suhu air

Temperature change of water (°C)

Jisim pelita kaca sebelum

pembakaran Mass of glass lamp

before burning (g)

Jisim pelita kaca selepas

pembakaran Mass of glass lamp after

burning (g)

Metanol, CH3OH Methanol

200 30 374.95 373.35

Etanol, C2H5OH Ethanol

200 30 332.00 330.80

Propanol, C3H7OH Propanol

200 30 344.38 343.30

Butanol,C4H9OH Butanol

200 30 372.90 371.90

(f) (i) Tenaga haba yang diserap = Jisim air X 4.2 X Perubahan suhu air Heat energy absorbed Mass of water X 4.2 X Temperature change of water

= 200 X 4.2 X 30 = 25 200 J (ii) Jisim propanol yang terbakar = Bilangan mol propanol Mass of propanol burnt Number of moles of propanol 60

= 1.08/60 = 0.0179816 = 0.02 mol (iii) Tenaga haba yang diserap = Haba pembakaran propanol Heat energy absorbed Heat of combustion of propanol

Bilangan mol propanol Number of moles of propanol = 25 200/ 0.018 = 1 400 00 J mol-1



[3M] (g)

[3M] (h) (2 320 ± 20 ) kJ mol-1

……………………………………………………………………………………………………….[3M] (i) 1. Incomplete combustion/ pembakaran tak lengkap 2. heat loss to the surroundings// kehilangan haba kepada persekitaran 3. Container absorbed some heat// bekas menyerap sedikit haba ……………………………………………………………………………………………………[3M] (j) Heat released that raises the temperature of water when 1 mol of alcohol is burnt Haba yang dibebaskan yang menaikkan suhu air apabila 1 mol alkohol terbakar ……………………………………………………………………………………………………….[3M]



Negeri Sembilan 2015-01

Set-up of apparatus/ Susunan radas Observation/ Pemerhatian

Set I/ Set I

Iron wool glows brightly Wul besi membara dengan terang

Set II/ Set II

Iron wool glows brighter/(burns brightly) Wul besi membara dengan lebihterang

Set III/ Set III

Iron wool glows dimly. Wul besi membara dengan malap

(b) Based on the observations in three sets of the experiment, state an inference. Berdasarkan pemerhatian dalam ketiga-tiga set eksperimen itu, nyatakan satu inferens. Reaction between iron wool with chlorine is most reactive followed by bromine and iodine Tindak balas antara ferum dengan klorin adalah lebih reaktif diikuti dengan bromin dan iodin ……………………………………………………………………………………………………….[3M] (c) (i) the manipulated variable./pemboleh ubah yang dimanipulasikan. Chlorine, bromine and iodine//types of halogens Klorin, bromin dan iodin// jenis halogen ……………………………………………………………………………………………………………. (ii) the responding variable./pemboleh ubah yang bergerak balas. Reactivity of halogen towards hot iron / brightness of glow Kereaktifan halogen terhadap ferum panas// kecerahan nyalaan ……………………………………………………………………………………………………………. (iii) the fixed variable./ pemboleh ubah yang dimalarkan. Iron wool// wul besi ……………………………………………………………………………………………………….[3M]

Iron wool Wul besi Bromine gas

Gas bromin

Heat Panaskan

Soda lime Kapur soda

Iron wool Wul besi Chlorine gas

Gas klorin

Heat Panaskan


Iron wool Wul besi Iodine gas

Gas iodin

Heat Panaskan




(d) State the hypothesis for the experiment./ Nyatakan hipotesis bagi eksperimen ini. Going down Group 17, the reactivity of halogen with iron wool decreases // Going down Group 17, the brightness of glow decreases. Menuruni Kumpulan 17, kereaktifan halogen dengan wul besi berkurang // Meneruni Kumpulan 17, kecerahan nyalaan berkurang. …………………………………………………………………………………………............. (e) State the operational definition for the reactivity of halogens in this experiment. Nyatakan definisi secara operasi bagi kereaktifan halogen dalam eksperimen ini. The brightness of glow when halogen is flowed to hot iron wool. Kecerahan nyalaan apabila halogen mengalir ke wul ferum panas. ……………………………………………………………………………………………………….[3M] (f) Arrange the three halogens in descending order of reactivity.

Susunkan ketiga-tiga halogen mengikut tertib kereaktifan menurun. Chlorine, Bromine, Iodine // klorin, bromin, iodin// Cl2, Br2, I2 ……………………………………………………………………………………………………….[3M] Negeri Sembilan 2016-01

Alcohol Alkohol

Reading of Electronic Balance Bacaan Penimbang Elektronik

Mass of alcohol used Jisim alkohol digunakan

(g) Before/ Sebelum After/ Selepas

Methanol Metanol

CH3OH

1.55

Ethanol Etanol

C2H5OH

1.20

Propanol Propanol

C3H7OH

1.10

364.95 g 363.40 g

322.00 g

320.80 g

354.40 g 353.30 g



(b) (i) Manipulated variable/ Pembolehubah dimanipulasikan Types of alcohols//[Name of alcohols] Jenis alkohol// [nama alkohol] …………………………………………………………………………………………………………….

(ii) Responding variable/Pembolehubah bergerak balas Heat of combustion//Temperature increase/change Haba pembakaran// suhu meningkat/ perubahan ……………………………………………………………………………………………………………. (iii) Fixed variable/ Pembolehubah dimalarkan Aluminium can//Water (Reject: Volume of water) Bekas Aluminium// Air (tolak isi padu air) ……………………………………………………………………………………………………….[3M] (c) State one hypothesis for this experiment. Nyatakan satu hipotesis bagi eksperimen ini. The higher the number of carbon atoms per molecule of alcohol, the higher the heat of combustion. Lebih tinggi bilangan atom karbon per molekul bagi alkohol, semakin tinggi haba pembakaran ……………………………………………………………………………………………………….[3M] (e) Predict the value of heat of combustion of pentanol. Draw a bar of pentanol on the graph in (d). Ramalkan nilai haba pembakaran bagi pentanol. Lukis satu bar bagi pentanol pada graf di (d). 2260 kJ mol-1 ……………………………………………………………………………………………………….[3M] (f) State the operational definition of heat of combustion of alcohol in this experiment. Nyatakan definisi secara operasi bagi haba pembakaran alkohol dalam eksperimen ini. The heat released/produced when 1 mole of alcohol is burnt in excess oxygen, thermometer reading increases. Haba dibebaskan/ dihasilkan apabila 1 mol alkohol terbakar dalam oksigen berlebihan, pembacaan termometer meningkat. ……………………………………………………………………………………………………….[3M]

Butanol Butanol

C4H9OH

1.61

332.90 g

331.29 g



(d) Using the data in Table 1.2, draw a bar chart of heat combustion of alcohols against types of alcohol. Dengan menggunakan Jadual 1.2, lukis carta bar bagi haba pembakaran alkohol melawan jenis alkohol. (i) Axes are labelled with correct unit (ii)Scale used must cover at least 50% of graph paper (iii)Uniform spacing and width for each bar Heat of combustion/kJ mol-1

2000

1800

1600

1400

1200

1000

800

600

400

200

0

Metanol Ethanol Propanol Butanol

Types of alcohol



Perlis 2017-02 (a) (i) State one observation in the experiment. Nyatakan satu pemerhatian dalam eksperimen ini. Yellow solid changes to grey solid//reading of weighing balance decreases//grey solid formed pepejal kuning berubah kepada pepejal kelabu// bacaan penimbang berkurangan // pepejal kelabu terbentuk ……………………………………………………………………………………………………….[3M] (ii) Give one inference based on your answer in (a) (i). Berikan satu inferens berdasarkan jawapan anda di (a)(i). Lead(II) oxide changed to lead // Lead(II) oxide is reduced//lead(II) metal is formed. Plumbum(II) oksida berubah menjadi plumbum // plumbum(II) oksida dikurangkan // logam plumbum terbentuk. ……………………………………………………………………………………………………….[3M]

(b) Determine the empirical formula of lead oxide. Given the relative atomic mass of Pb = 207 and O = 16 Tentukan empirikal formula bagi plumbum oksida. Diberi jisim atom relatif bagi Pb = 207 dan O = 16.

Description

Mass (g)

Combustion tube + asbestos paper Tiub pembakaran + kertas abestos

64.00

Combustion tube + asbestos paper + lead oxide/yellow solid Tiub pembakaran + kertas abestos + plumbum(II) oksida// pepejal kuning

117.52

Combustion tube + asbestos paper + lead/ grey solid Tiub pembakaran + kertas abestos + plumbum/ logam kelabu

113.68

Element Pb O

Mass (g) 113.68-64.00 // 49.68 117.52 – 113.68 // 3.84

Number of moles (mol) 49.68÷207 // 0.24 3.84 ÷16// 0.24

Ratio of moles 0.24/0.24// 1 0.24/0.24// 1

Empirical formula : PbO c.

Empirical formula/ Formula empririk Molecular formula/ Formula molekul

CH CH2

CH2O

C6H12O6

C3H6

C2H4O2



Johor 2015 set 3-01 (a) Bubbles of gas is released/ Gelembung gas terhasil Magnesium dissolves/ Magnesium melarut ……………………………………………………………………………………………………….[3M] (b) Magnesium reacts with acid to produced magnesium chloride and hydrogen gas Magnesium bertindak balas dengan asid untuk menghasilkan magnesium klorida dan gas hidrogen ……………………………………………………………………………………………………….[3M] (c) Exp 1 : 17.0 s Exp 2 : 31.0 s Exp 3 : 39.0 s Exp 4 : 47.5 s

Exp 5 : 57.0 s (d)

Experiment Concentration / mol d m-3 Time taken /s

1 1.0 17.0

2 0.8 31.0

3 0.6 39.0

4 0.4 47.5

5 0.2 57.0

3 marks ] (e) State the variables of the following./ Nyatakan pembolehubah yang berikut. (i) Manipulated variable/ Pembolehubah di manipulasi: Concentration of acid/ Kepekatan asid ……………………………………………………………………………………………………………. (ii) Responding variable / Pembolehubah bergerak balas: Rate of reaction / Time taken for magnesium to dissolve Kadar tindak balas / Masa diambil untuk magnesium melarut ……………………………………………………………………………………………………………. (iii) Fixed variable / Pembolehubah di tetapkan: Temperature of acid / Quantity of Magnesium Suhu asid / Kuantiti Magnesium ……………………………………………………………………………………………………….[3M] (f) The higher the concentration of acid the higher the rate of reaction. Semakin tinggi kepekatan asid semakin tinggi kadar tindak balas ……………………………………………………………………………………………………….[3M] (g) The higher the concentrations of hydrochloric acid the shorter the time taken for magnesium powder to dissolve completely in acid. Semakin tinggi kepekatan asid hidroklorik, masa yang lebih singkat di ambil untuk serbuk magnesium melarut sepenuhnya dalam asid. ……………………………………………………………………………………………………….[3M]



(h)

[ 3 marks ] (i) [ 5 – 15 ] saat ……………………………………………………………………………………………………….[3M] (j)

Increase the initial rate of reaction Decrease the initial rate of reaction

sulphuric acid Ethanoic acid

heating of acid magnesium ribbon

[3M] (k) The higher the concentrations of hydrochloric acid react with magnesium, the shorter the time taken Semakin tinggi kepekatan asid hidroklorik bertindak balas dengan magnesium, semakin masa singkat yang di ambil ……………………………………………………………………………………………………….[3M]

Concentration / mol dm-3

Time / s



Kedah-2017-03

a Does vulcanised rubber more elastic than unvulcanised rubber? Adalah getah tervulkan lebih kenyal daripada getah tak tervulkan?

b Manipulated variable Type of rubber //Vulcanised rubber and unvulcanised rubber/ Jenis getah // getah tervulkan dan getah tak tervulkan Responding variable Elasticity of rubber Kekenyalan getah Constant variable

Initial length of rubber // Mass of weight Panjang awal getal // jisim pemberat

c Vulcanised rubber is more elastic than unvulcanised rubber. Getah tervulkan lebih kenyal berbanding getah tak tervulkan

d Materials / Bahan Vulcanised rubber strip, Unvulcanised rubber strip Jalur getah tervulkan,Jalur getah tak tervulkan

Radas Retord stand with clamp, meter ruler, clip, 200 g weight kaki retod dengan pengapit, Pembaris meter, Klip , 200 g pemberat

e 1. ukur dan potong jalur getah tervulkan kepada [8-10] cm panjang 2. Rekodkan panjang awal jalur getah 3. Gantung jalur getah pada ketinggian 50 cm 4. Gantung [50-200]g pemberat pada jalur getah dan rekod panjang selepas diregangkan. 5. Tanggalkan pemberat , ukur dan rekod panjang jalur getah. 6. Ulang eksperimen dengan menggunakan jalur getah tak tervulkan

f

Jenis jalur getah

Panjang awal (cm)

Panjang dengan

pemberat

(cm)

Panjang selepas pemberat dikeluarkan

(cm)

Getah tervulkan

Getah tak tervulkan



Johor 2017 Set02 Cadangan jawapan

a Does acids and alkalis affects on the coagulation of latex?// Does latex coagulate when acid is added and does not coagulate when alkali is added? Adakah asid dan alkali mempengaruhi pembekuan lateks? // Adakah lateks membeku apabila asid ditambahkan dan tidak membeku apabila alkali ditambahkan?

b Manipulated variable : Type of acids and alkalis // ammonia solution and ethanoic acid Jenis asid dan alkali// Larutan ammonia dan asid etanoik

Responding variable Coagulation of latex//Coagulate or not Pembekuan lateks //Membeku atau tidak Constant variable Type of latex // Volume of latex // Temperature Jenis lateks //Isipadu lateks// Suhu

c The presence of ethanoic acid, latex coagulate and the presence of ammonia , latex does not coagulate // When ethanoic acid is added to the latex, coagulation occur but when ammonia solution is added to the latex, coagulation do not occur. Dalam kehadiran asid etanoik, lateks membeku dan dalam kehadiran ammonia, lateks tidak membeku // Apabila asid etanoik ditambahkan ke dalam lateks, pembekuan berlaku tetapi apabila larutan ammonia ditambahkan kepda lateks, pembekuan tidak berlaku.

d Materials: Latex, ethanoic acid, ammonia solution

Apparatus: beaker, glass rod

e 1. Latex is poured is into a beaker. 2. Ethanoic acid is added into the beaker 3. The mixture is stirred with a glass rod. 4. The changes occurred are observed and recorded. 5. The step 1 to 4 are repeated by replacing ethanoic acid with ammonia solution.

f

Mixture//substance added to latex Observation

Latex + ethanoic acid // ethanoic acid

Latex + ammonia solution// ammonia



SPM 2004-03

Cadangan jawapan

a Dapat menghasilkan dua ester dengan menggunakan asid karboksilik yang sama dan dapat memperihalkan bau. It can produce two esters using the same carboxylic acid and can describe the scents.

b Tindak balas antara asid butanoik dengan alkohol berlainan menghasilkan bau ester yang berlainan The reaction between butanoic acid and different alcohols produces a difference ester scents.

c Bahan: Asid butanoik, metanol, etanol, asid sulfurik pekat Materials: Butanoic acid, methanol, ethanol, concentrated sulfuric acid Radas: Tabung uji , bikar, penitis, penunu Bunsen, pemegang tabung uji Apparatus: Test tube, beaker, dropper, Bunsen burner, test tube holder

d 1. Metanol mutlak ditambahkan ke dalam asid butanoik. 2. Campuran digoncangkan/ dikacau. 3. Beberapa titis asid sulfurik pekat dimasukkan ke dalam campuran dengan

menggunakan penitis. 4. Campuran dihangatkan selama beberapa minit. 5. Hasil tindak balas dituangkan ke dalam bikar berisi air. 6. Bau yang terhasil dihidu. 7. Ulangi langkah 1 hingga 6 diulangi dengan menggantikan metanol dengan

etanol.

e

Alkohol Alcohol

Asid karboksilik Carboxylic acid

Bau scents.

Metanol Methanol

Asid butanoik Carboxylic acid

Etanol ethanol

Asid butanoik Carboxylic acid



Johor 2015 set 2

a Which compounds conducts electricity in molten state?// Can lead (II) bromide and naphthalene conduct electricity in molten state? Yang manakah sebatian yang boleh menjalankan elektrik dalam keadaan lebur? // Adakah plumbum(II) bromida dan naphthalene menjalankan elektrik dalam keadaan lebur?

b (a) Manipulated variable : Type of compound/ Jenis sebatian (b) Responding variable : Conductivity of electric/ Konduktiviti elektrik (c) Fixed variable : molten state/ keadaan lebur

c Ionic compound/Lead (II) bromide conducts electricity in molten state whereas covalent compound/naphthalene cannot conduct electricity in molten state.

Sebatian ion/ plumbum(II) bromida boleh mengalirkan elektrik dalam keadaan lebur manakala sebatian kovalen / naftalena tidak dapat mengalirkan elektrik dalam keadaan lebur.

d Apparatus/ Radas Crucible, wire gauze, tripod stand, Bunsen burner, connecting wire, voltmeter /bulb, carbon electrodes, battery, spatula, clay pipe triangle Mangkuk pijar, kasa dawai, tungku kaki tiga, Penunu bunsen, wayar penyambung, voltmeter / mentol, elektrod karbon, bateri, spatula, segitiga tanah liat Materials/ Bahan: Lead (II) bromide, naphthalene plumbum(II) bromida, naftalena

e 1. Add lead (II) bromide powder to a crucible 2. Place it on a clay pipe triangle 3. Connect the carbon electrode to the battery and voltmeter 4. Dip the carbon electrode into lead (II) bromide 5. Heat it very strongly 6. Record the voltmeter reading 7. Repeat experiment using naphthalene

f

Substance Bahan

Voltmeter reading/ V Bacaan voltmerer

Lead (II) bromide Plumbum(II) bromida

Naphthalene naftalena



Kedah 2016-02

a Do the types of electrodes affect the types of products formed at anode? Does the type of electrode/ anode affect the choice of ions to be discharged? Adakah jenis elektrod mempengaruhi jenis hasil yang terbentuk di anod? Adakah jenis elektrod / anod mempengaruhi pemilihan ion yang akan dinyahcas?

b Manipulated variable: Types of electrode/ anode Jenis elektrod/ anod Responding variable: Product formed at the anode Hasil yang terhasil di anod Fixed variable: Electrolyte// The concentration of electrolyte

Elektrolit// kepekatan elektrolit

c When carbon electrodes are used oxygen/ bubble produced and when copper electrodes are used brown solid/ copper formed at the anode . Apabila elektrod karbon digunakan, oksigen / gelembung dihasilkan dan apabila elektrod kuprum digunakan, pepejal perang/ kuprum yang terbentuk di anod.

d Materials: 1. copper(II) sulphate solution, (0.5 - 2.0) mol dm-3 //any suitable solution that match with metal plate used. 2. carbon rod 3. copper plate// any metal plate that match with a solution used. 4. wooden splinter// any suitable material used for testing a gas or any product at anode. Apparatus: 1. electrolytic cell 2. battery 3. connecting wire 4. test tube Bahan: 1. larutan kuprum(II) sulfat, (0.5 - 2.0) mol dm-3 // sebarang larutan yang sesuai dengan plat logam yang digunakan. 2. rod karbon 3. plat kuprum // sebarang plat logam yang sepadan dengan penyelesaian yang digunakan. 4. kayu uji // bahan yang sesuai digunakan untuk menguji gas atau sebarang produk di anod. Peralatan: 1. sel elektrolitik 2. bateri 3. menyambung wayar 4. tabung uji

e 1. Fill the electrolytic cell (beaker) with half full of copper(II) sulphate solution (any suitable electrolyte that match with metal plate used). 2. A test tube filled with copper(II) solution is inverted on the anode carbon electrode.



3. Complete the circuit. 4. Electricity is flowed. 5. Record observation at anode.. 6. Step 1 -5 is repeated using copper plate

f

Type of electrode Jenis elektrod

Observation pemerhatian

Carbon Karbon

Copper/ any metal Kprum/ sebarang logam



Kelantan 2015

a Does the type of electrode/anode affect the choice of ions to be discharged? Adakah jenis elektrod / anod mempengaruhi pemilihan ion yang akan dinyahcas?

b Manipulated variable Type of electrode/ anode// Jenis elektrod / anod Responding variable Product formed at anode/ hasil terbentuk di anod Controlled variable Electrolyte/ Elektrolit

c Type of electrode/anode will influence the choice of ion to be discharged// type of electrode/anode will produce different product. Jenis elektrod / anod akan mempengaruhi pilihan ion yang akan dinyahcaskan// jenis elektrod / anod akan menghasilkan hasil yang berbeza.

d Materials: 1. copper(II) sulphate solution, (0.5 – 2.0) mol dm-3 //any suitable solution that match with metal plate used. 2. carbon rod 3. copper plate// any metal plate that match with a solution used. 4. wooden splinter// any suitable material used for testing a gas or any product at anode. Apparatus: 1. electrolytic cell 2. battery 3. connecting wire 4. test tube Bahan: 1. larutan kuprum(II) larutan sulfat, (0.5 - 2.0) mol dm-3 // sebarang larutan yang sesuai dengan plat logam yang digunakan. 2. rod karbon 3. plat kuprum // sebarang plat logam yang sepadan dengan penyelesaian yang digunakan. 4. kayu uji // bahan yang sesuai digunakan menguji gas atau sebarang produk di anod. Radas: 1. sel elektrolitik 2. bateri 3. menyambung wayar 4. tabung uji

e 1. Fill the electrolytic cell (beaker) with half full of copper(II) sulpahate solution (any suitable electrolyte that match with metal plate used).

2. A test tube filled with copper(II) solution is inverted on the anode carbon electrode.

3. Complete the circuit. 4. Electricity is flowed. 5. Record observation at anode..



6. Step 1-5 is repeated using copper plate

f

Type of electrode Jenis elektrod

Observation pemerhatian

Carbon Karbon

Copper/ any metal Kprum/ sebarang logam

Documents

SPM2004-01 Pemerhatian/ Inferences/ · 2019-11-15 · (b) Determine the empirical formula of lead oxide. Given the relative atomic mass of Pb = 207 and O = 16 Tentukan empirikal formula