JOM KIMIA A1 L O A D PART 3 I N G PART 3 WHAT YOU MUST KNOW ABOUT CHEMISTRY PAPER 3 SKOR A1 : THE SCORE To Score Paper 3 is To Tackle Paper 3 KAMAL ARIFFIN BIN SAAIM SMK DATO’ BENTARA LUAR BATU PAHAT e-mel : kamal_ariffin2006@yahoo.com website: http://kemhawk.webs.com/ 2 Past SPM Question Scoring YEAR: 2005 PART 3 YEAR: 2006 No. 1 No. 2 YEAR: 2004 YEAR: 2007 No. 1 No. 2 YEAR: 2003 YEAR: 2008 No. 1 No. 2 CHEMISTRY PAPER 3 4541/3 3 Past SPM Question Scoring PART 3 Scoring SPM Paper 3 2006 Question No. 1 Question No. 2 [Click button to see the question] CHEMISTRY PAPER 3 4541/3 4 PART 3 SPM 2006 Question no. 1 Tips to write a good report: 1(a): Dapat mencatat suhu awal, suhu tertinggi dan perubahan suhu dengan tepat. Contoh jawapan: Initial temperature 28 oC Highest temperature 40 oC Change in temperature 12 oC CHEMISTRY PAPER 3 4541/3 5 PART 3 SPM 2006 Question no. 1 Tips to write a good report: 1(b): Dapat membina jadual yang mengandungi tiga perkara berikut untuk kedua-dua eksperimen. Contoh jawapan: Eksperimen Suhu awal I II CHEMISTRY PAPER 3 4541/3 28 T1 Suhu tertinggi Perubahan suhu 40 T2 T2 T3 6 PART 3 SPM 2006 Question no. 1 Tips to write a good report: 1(c): Dapat memberikan hipotesis dengan tepat. Contoh jawapan: Asid hidroklorik / kuat menghasilkan (haba peneutralan) / (perubahan / kenaikan suhu) yang lebih tinggi / rendah daripada asid etanoik / lemah Skor 3 CHEMISTRY PAPER 3 4541/3 7 PART 3 SPM 2006 Question no. 1 Tips to write a good report: 1(c): Dapat memberikan hipotesis dengan kurang tepat. Contoh jawapan: Haba peneutralan asid hidroklorik dengan natrium hidroksida adalah lebih tinggi Daripada haba peneutralan asid etanoik dengan natrium hidroksida Skor 2 CHEMISTRY PAPER 3 4541/3 8 PART 3 SPM 2006 Question no. 1 Tips to write a good report: 1(c): Dapat memberikan idea hipotesis dengan betul. Contoh jawapan: Kenaikan suhu mempengaruhi nilai haba peneutralan. Skor 1 CHEMISTRY PAPER 3 4541/3 9 SPM 2006 Question no. 1 PART 3 Tips to write a good report: 1(d): Dapat meramal suhu dengan betul dalam julat [ 12 < CHEMISTRY PAPER 3 4541/3 Ө ≤ 15 ] oC 10 SPM 2006 Question no. 1 PART 3 Tips to write a good report: 1(e): Dapat menyatakan kegunaan langsung dengan tepat mengapa suhu awal dan suhu tertinggi perlu direkodkan. Contoh jawapan: Untuk mendapatkan perubahan / kenaikan / perbezaan suhu. CHEMISTRY PAPER 3 4541/3 11 SPM 2006 Question no. 1 PART 3 Tips to write a good report: 1(f): Dapat memberikan kaedah memperoleh perubahan dengan betul Contoh jawapan: Suhu tertinggi – suhu awal // Suhu akhir – suhu awal CHEMISTRY PAPER 3 4541/3 12 SPM 2006 Question no. 1 PART 3 Tips to write a good report: 1(g): Dapat menyatakan mana-mana 2 pemerhatian dengan betul Contoh jawapan: 1. 2. 3. 4. Cawan polistirena menjadi panas Bacaan termometer meningkat Tiada perubahan warna larutan Bau asid etanoik hilang CHEMISTRY PAPER 3 4541/3 13 SPM 2006 Question no. 1 PART 3 Tips to write a good report: 1(h): Dapat memberikan mana-mana 3 pembolehubah yang dimalarkan dengan tepat daripada senarai berikut Contoh jawapan: 1. 2. 3. 4. Kepekatan (bahan tindak balas) Isipadu (bahan tindak balas) Bekas // cawan polistriena // cawan Suhu persekitaran CHEMISTRY PAPER 3 4541/3 14 SPM 2006 Question no. 1 PART 3 Tips to write a good report: 1(i)(i): Dapat memberikan definisi secara operasi dengan tepat Contoh jawapan: 1. Haba dibebaskan apabila 1 mol ion H+ bertindak balas dengan 1 mol ion OH- untuk menghasilkan 1 mol air 2. Haba dibebaskan apabila 1 mol air dihasilkan 3. Haba yang dibebaskan per bilangan CHEMISTRY PAPER 3 4541/3 15 SPM 2006 Question no. 1 PART 3 Tips to write a good report: 1(i)(ii): Dapat menyatakan sebab yang tepat mengapa nilai y lebih tinggi daripada nilai x Contoh jawapan: 1. Perubahan suhu eksp. II / Y lebih tinggi 2. Eksp. II menggunakan asid kuat, asid etanoik adalah asid lemah 3. HCl / asid hidroklorik adalah asid kuat, adalah asid lemah 4. Perubahan suhu eksp. II lebih tinggi berbanding eksp I CHEMISTRY PAPER 3 4541/3 16 SPM 2006 Question no. 1 PART 3 Tips to write a good report: 1(j): Dapat membuat pengelasan ketiga-tiga asid dengan tepat Contoh jawapan: Nama Asid Jenis asid Asid etanoik Lemah Asid hidroklorik Kuat Asid metanoik Lemah CHEMISTRY PAPER 3 4541/3 17 SPM 2006 Question no. 2 Stretching phases Length of vulcanised rubber Length of unvulcanised rubber 45 mm 45 mm 59 mm 60 mm 45 mm 50 mm Before During After Plan an experiment to compare one characteristic shown in Diagram 2 for both types of rubber. 18 SPM 2006 Question no. 2 PART 3 Tips to write a good report: 2(a). Tujuan : Dapat memberikan tujuan eksperimen dengan tepat i. Membandingkan/membezakan/mengkaji/ menentukan kekenyalan getah tervulkan dengan getah tak tervulkan ii. Menentukan sama ada getah tervulkan lebih kenyal daripada getah tak tervulkan CHEMISTRY PAPER 3 4541/3 19 SPM 2006 Question no. 2 PART 3 Tips to write a good report: 2(b). Pembolehubah / variable : Dapat menyatakan ketiga-tiga pembolehubah dengan betul Pemb. dimanipulasikan: Getah tervulkan dan getah tak tervulkan // jenis getah Pemb. bergerak balas: Perubahan panjang jalur getah // pemanjangan getah // kekenyalan getah Pemb. Dimalarkan: Panjang / saiz jalur getah // pemberat // beban CHEMISTRY PAPER 3 4541/3 20 SPM 2006 Question no. 2 PART 3 Tips to write a good report: 2(c). Hipotesis: Dapat menyatakan ketiga-tiga pembolehubah dengan betul Pemb. dimanipulasikan: Getah tervulkan dan getah tak tervulkan // jenis getah Pemb. bergerak balas: Perubahan panjang jalur getah // pemanjangan getah // kekenyalan getah Pemb. Dimalarkan: Panjang / saiz jalur getah // pemberat // beban CHEMISTRY PAPER 3 4541/3 21 SPM 2006 Question no. 2 PART 3 Tips to write a good report: 2(c). Hipotesis: Dapat menyatakan ketiga-tiga pembolehubah dengan betul Pemb. dimanipulasikan: Getah tervulkan dan getah tak tervulkan // jenis getah Pemb. bergerak balas: Perubahan panjang jalur getah // pemanjangan getah // kekenyalan getah Pemb. Dimalarkan: Panjang / saiz jalur getah // pemberat // beban CHEMISTRY PAPER 3 4541/3 22 SPM 2006 Question no. 2 PART 3 Tips to write a good report: 2(d). Bahan dan radas: Dapat menyatakan bahan dan radas yang lengkap Getah tervulkan, getah tak tervulkan Klip Pemberat (10 – 100)g Kaki retort, Pembaris jalur CHEMISTRY PAPER 3 4541/3 23 SPM 2006 Question no. 2 Tips to write a good report: PART 3 2(e). Prosedur eksperimen: 1. Gantung jalur getah *tervulkan/(tak tervulkan) 2. Ukur panjang asal // ambil bacaan 3. Gantungkan pemberat 4. Ukur panjang getah 5. Tanggalkan pemberat voltmeter reading. 6. Ukur panjang getah 7. Ulang eksperimen menggunakan getah tak tervulkan CHEMISTRY PAPER 3 4541/3 24 PART 3 SPM 2006 Question no. 2 Tips to write a good report: 2(e). Penjadualan data: Manipulated Variable Jenis getah Responding Variable Panjang asal /cm Panjang semasa pemberat digantung /cm Panjang setelah pemberat ditanggalkan /cm Getah tervulkan Getah tak tervulkan CHEMISTRY PAPER 3 4541/3 25 Past SPM Question Scoring PART 3 Scoring SPM Paper 3 2007 Question No. 1 Question No. 2 [Click button to see the question] CHEMISTRY PAPER 3 4541/3 26 PART 3 SPM 2007 Question no. 1 Tips to write a good report: 1(a)(i) : Able to read all reading accurately to one decimal point with unit. Sample answer: Experiment 1 28.0 oC 36.0 oC Experiment II 29.0 oC 25.0 oC Experiment III 27.0 oC 32.0 oC Experiment IV 30.0 oC 27.0 oC CHEMISTRY PAPER 3 4541/3 27 SPM 2007 Question no. 1 PART 3 Tips to write a good report: 1(a)(ii) : Able to construct a table that contains the following information. Sample answer; 1. Heading in the table: Experiment, Initial temperature, Highest/Lowest temperature 2. Transfer all temperature reading from (a)(i) correctly 3. With unit at heading CHEMISTRY PAPER 3 4541/3 28 PART 3 SPM 2007 Question no. 1 Tips to write a good report: Sample answer: I/1 Initial temperature /oC 28.0 Highest / Lowest temperature /o C 36.0 II / 2 29.0 25.0 III / 3 27.0 32.0 IV / 4 30.0 27.0 Experiment CHEMISTRY PAPER 3 4541/3 29 PART 3 SPM 2007 Question no. 1 Tips to write a good report: 1(a)(iii) : Able to make correct classification for the four experiments. Sample answer: Exothermic reaction Endothermic reaction I III II IV CHEMISTRY PAPER 3 4541/3 30 SPM 2007 Question no. 1 PART 3 Tips to write a good report: 1(b)(i) : Able to give any three things correctly that must be kept constant. Sample answer: 1. volume of water 2. polystyrene cups 3. thermometers 4. mass of sodium hydroxide 5. reject: amount, quantity 6. size of cups 7. sodium hydroxide and water CHEMISTRY PAPER 3 4541/3 31 SPM 2007 Question no. 1 PART 3 Tips to write a good report: 1(b)(ii) :Able to state the hypothesis accurately Sample answer: 1. The reaction between sodium hydroxide and water is an exothermic / endothermic reaction. 2. The reaction between NaOH and water results in increase/decrease in temperature. 3. When NaOH dissolves/added in water, it increases/decreases in temperature/released heat/absorbed heat CHEMISTRY PAPER 3 4541/3 32 SPM 2007 Question no. 1 PART 3 Tips to write a good report: 1(c)(i) :Able to state; Dropped/decreased 4 oC // - 4 oC // 29 – 25 oC Able to state two correct reasons; Sample answer: 1. Heat/energy is absorbed // Endothermic reaction 2. The energy in product is more than the energy in reactants 3. The heat/energy absorbed during bond breaking is greater than the heat/energy released during the bond making. CHEMISTRY PAPER 3 4541/3 33 SPM 2007 Question no. 1 PART 3 Tips to write a good report: 1(c)(ii) : Able to give the operational definition accurately by stating the following three information. - The temperature decreases // The temperature goes down/dropped - Endothermic reaction - Heat/energy absorbed Sample answer: The decrease in temperature shows that endothermic reaction happens where heat/energy is absorbed from the surroundings CHEMISTRY PAPER 3 4541/3 34 SPM 2007 Question no. 1 PART 3 Tips to write a good report: 1(d) : Able to predict the three temperature readings correctly. Sample answer: 1. Sulphuric acid 2. Nitric acid 3. Ethanoic acid CHEMISTRY PAPER 3 4541/3 37 oC 32 oC 28 – 31 oC 35 SPM 2007 Question no. 1 PART 3 Tips to write a good report: 1(e)(i) : Able to state three correct observations. Sample answer: 1. Final temperature is lower than the initial temperature. // The temperature decreases // Level of mercury decreases // thermometer reading decreases. 2. Bubbles are release // effervescence. 3. The volume of the solution is greater/ increases // level of solution increases/ higher. CHEMISTRY PAPER 3 4541/3 36 SPM 2007 Question no. 1 PART 3 Tips to write a good report: 1(e)(ii) : Able to make an accurate inference based on the chemical equations. Sample answer: (Endothermic reaction)/heat/energy is absorbed) when hydrochloric acid/HCl with sodium hydrogen carbonate/NaHCO3 to produce sodium chloride/NaCl, carbon dioxide/CO2 and water. CHEMISTRY PAPER 3 4541/3 37 SPM 2007 Question no. 1 PART 3 Tips to write a good report: 1(e)(iii) : Able to sketch the graph of the change of the volume of CO2 gas against time by showing the following three information; 1. The axes are labeled correctly 2. Correct unit 3. Curve on the graph shows the increase of volume CHEMISTRY PAPER 3 4541/3 38 SPM 2007 Question no. 1 PART 3 Tips to write a good report: Sample answer: Volume of CO2 / cm3 Time / minute CHEMISTRY PAPER 3 4541/3 39 SPM 2007 Question no. 2 PART 3 Identify the factor that influences the differences in the voltage. Plan a laboratory experiment to construct an electrochemical cell to determine one factor that influences the differences in the voltage. CHEMISTRY PAPER 3 4541/3 40 PART 3 SPM 2007 Question no. 2 Tips to write a good report: 1. Problem statement: Start with ‘Does …..’ Does the position of the two metals in Electrochemistry Series affect the voltage? CHEMISTRY PAPER 3 4541/3 41 PART 3 SPM 2007 Question no. 2 Tips to write a good report: 2. Aim: Find “Statement” from the question To determine one factor that influences the differences in the voltage CHEMISTRY PAPER 3 4541/3 42 PART 3 SPM 2007 Question no. 2 Tips to write a good report: 3. Variables : Always given in the question. Manipulated variable : Pairs of metals Responding variables: Voltage Constant variable CHEMISTRY PAPER 3 4541/3 : Electrolyte /name 43 PART 3 SPM 2007 Question no. 2 Tips to write a good report: 4. Hypothesis : Manipulated + responding + direction The further the distance of the pair of metals in the Electrochemical Series, the voltage become greater. CHEMISTRY PAPER 3 4541/3 44 PART 3 SPM 2007 Question no. 2 Tips to write a good report: 5. Materials and apparatus : List all the materials and apparatus that involves, Aluminium, zinc, copper, beaker, voltmeter, wires, sand paper, the copper(II) sulphate solution (any suitable), CHEMISTRY PAPER 3 4541/3 45 PART 3 Tips: Name at least three metals below than Ca in ECS If use K, Na, Ca : score1 If use any acid as electrolyte, the molarities is less than 1.0 mol dm-3 If use concentrated/bench/molarity greater than 1.0 moldm-3 : score1 No need to state the volume and the concentration of the electrolyte. If you do make sure it suitable/accurate. CHEMISTRY PAPER 3 4541/3 46 PART 3 SPM 2007 Question no. 2 Tips to write a good report: 6. Procedures: use simple sentences, passive or active voice, use keywords, sequence Key word: pour, dip, connect, record, repeat, stir, heated, observe, measure, add, put into, CHEMISTRY PAPER 3 4541/3 47 PART 3 Not Suggested Answers: 6. Procedures: use simple sentences, passive or active voice, use keywords, sequence CHEMISTRY PAPER 3 4541/3 48 PART 3 Suggested Answers: 1. Pour the copper sulphate into a beaker. 2. Clean aluminium and copper with sand paper. 3. Dip aluminium and copper into the solution. 4. Connect it to the voltmeter // complete the circuit. 5. Record the voltmeter reading. 6. Repeat steps 1-5 / experiment by substituting aluminium with zinc / one metal for another. CHEMISTRY PAPER 3 4541/3 49 PART 3 SPM 2007 Question no. 2 Tips to write a good report: 7. Tabulation: heading for manipulated and responding variables, Responding Manipulated units, Variable Variable Pairs of metal Voltage (V) Aluminium and copper HOME Zinc and copper CHEMISTRY PAPER 3 4541/3 Max: Score 2 50 Past SPM Question Scoring PART 3 Scoring SPM Paper 3 2008 Question No. 1 Question No. 2 [Click button to see the question] CHEMISTRY PAPER 3 4541/3 51 SPM 2008 Question no. 1 PART 3 Tips to write a good report: 1(a) : Able to state the relationship correctly between the manipulated variable and the responding variable. Sample answer: Acid coagulated latex while alkali does not coagulate the latex. CHEMISTRY PAPER 3 4541/3 52 SPM 2008 Question no. 1 PART 4 Tips to write a good report: 1(b) : Able to state the time taken in Set I and Set II accurately with correct unit. Sample answer: Set I : 5 minutes // 300 second // 0.03 hours Set II: 360 minutes // 21600 seconds // 6 hours CHEMISTRY PAPER 3 4541/3 53 PART 4 SPM 2008 Question no. 1 Tips to write a good report: 1(c) : Able to construct a table to record the time taken for Set I and Set III of experiment that contains: 1. Correct titles 2. Readings and units Sample answer: Set Time taken /minutes I 5 III 360 CHEMISTRY PAPER 3 4541/3 Or Set Time taken I 5 minutes III 6 hours 54 SPM 2008 Question no. 1 PART 4 Tips to write a good report: 1(d): Able to state all correct observations, one from each set. Sample answer: Set I : 1. 2. Set II: 1. 2. 3. Set III: 1. 2. CHEMISTRY PAPER 3 4541/3 Latex coagulates A solid lump is formed Latex does not coagulate No change Liquid Latex coagulates Solid lump is formed 55 SPM 2008 Question no. 1 PART 4 Tips to write a good report: 1(e): Able to state the correct operational definition for coagulation of latex correctly. Sample answer: Latex becomes solid when acid is added // Latex becomes solid when exposed to air CHEMISTRY PAPER 3 4541/3 56 SPM 2008 Question no. 1 PART 4 Tips to write a good report: 1(f): Able to state all three variables correctly Sample answer: Manipulated variable: Ethanoic acid / Acid , Ammonia solution / Alkali Responding Variable: Coagulate/Does not coagulate// Time taken for coagulation Constant Variable: CHEMISTRY PAPER 3 4541/3 Volume of latex/acid/(ammonia solution)/alkali//latex// temperature 57 SPM 2008 Question no. 1 PART 4 Tips to write a good report: 1(g)(i) : Able to state the observation correctly Sample answer: Latex coagulate // Latex becomes white // Latex is solidified CHEMISTRY PAPER 3 4541/3 58 SPM 2008 Question no. 1 PART 4 Tips to write a good report: 1(g)(ii) : Able to give both explanations correctly Sample answer: 1. Ammonia is neutralized // OH- ions reacted with H+ ions 2. Acid / H+ ions neutralized (negative charged) / (protein membrane) CHEMISTRY PAPER 3 4541/3 59 SPM 2008 Question no. 1 PART 4 Tips to write a good report: 1(h) : Able to explain the following aspects correctly 1. The presence of bacteria 2. Bacteria produce acid Sample answer: Bacteria produce acid / H+ ions. CHEMISTRY PAPER 3 4541/3 60 SPM 2008 Question no. 1 PART 4 Tips to write a good report: 1(i)(i) :Able to compare correctly by referring to (time frame) / concentration of H+ ions Sample answer: The concentrations /number/amount/quantity of H+ ions in Set I is higher // [vice versa] CHEMISTRY PAPER 3 4541/3 61 PART 4 SPM 2008 Question no. 1 Tips to write a good report: 1(i)(ii) :Able to classify all the four substances correctly Sample answer: Can coagulate latex Nitric acid Methanoic acid Total marks: 33 CHEMISTRY PAPER 3 4541/3 Cannot coagulate latex Potassium hydroxide Sodium hydroxide Home 62 SPM 2008 Question no. 2 PART 3 Statement 1 Lithium, Li, moves slowly at random on the surface of the water with a little fizzing. The water then turns red litmus paper to blue Statement 2 Sodium, Na, moves rapidly at random on the surface of the water with a ‘hissing’ sound. The water then turns red litmus paper to blue. Statement 3 Potassium, K, moves very rapidly at random on the surface of the water. It ignites with a lilac flame with a ‘pop’ and a ‘hissing’ sound. The water then turns red litmus paper to blue. Plan a laboratory experiment to investigate the reactivity of lithium, sodium and potassium with water. 63 PART 3 SPM 2008 Question no. 2 Tips to write a good report: a. Aim: Find from the question Plan a laboratory experiment to investigate the reactivity of lithium, sodium and potassium with water. Sample answer: To investigate the reactivity of Group 1 elements/lithium, sodium and potassium with water CHEMISTRY PAPER 3 4541/3 64 PART 3 SPM 2008 Question no. 2 Tips to write a good report: b. Variables : Always given in the question. Plan a laboratory experiment to investigate the reactivity of lithium, sodium and potassium with water. Sample answer: Manipulated Variable: Elements of Group 1 Responding Variable : Reactivity Constant Variable CHEMISTRY PAPER 3 4541/3 : Temperature / size of alkali metal 65 PART 3 SPM 2008 Question no. 2 Tips to write a good report: c. Hypothesis: Relationship between the manipulated variable and the responding variable with direction. Sample answer: (The lower/higher position of metal in) / (going down/up) Group 1, the more reactive is the metal in reaction with water. CHEMISTRY PAPER 3 4541/3 66 PART 3 SPM 2008 Question no. 2 Tips to write a good report: d. List of substances and apparatus: Complete list of substances and apparatus. Sample answer: Substances: Lithium, sodium, potassium, water Apparatus : Water trough/basin/pale/tray/tank, knife, forceps, filter paper, CHEMISTRY PAPER 3 4541/3 67 PART 3 SPM 2008 Question no. 2 Tips to write a good report: e. Procedure : List all the steps correctly Sample answer: 1. Fill the water trough with water 2. Cut piece of lithium using a knife and forceps 3. Dry the lithium using filter paper 4. Place the lithium on the surface of water 5. Record all the changes / observation 6. Repeat (step 1 to 5) / experiment using sodium and potassium CHEMISTRY PAPER 3 4541/3 68 PART 3 SPM 2008 Question no. 2 Tips to write a good report: e. Procedure : List all the steps correctly Sample answer: 1. Fill the water trough with water 2. Cut piece of lithium using a knife and forceps 3. Dry the lithium using filter paper 4. Place the lithium on the surface of water 5. Record all the changes / observation 6. Repeat (step 1 to 5) / experiment using sodium and potassium CHEMISTRY PAPER 3 4541/3 69 PART 3 SPM 2008 Question no. 2 Tips to write a good report: e. Tabulation of data: Tabulate the data with the following aspects 1. Correct titles 2. Complete list of elements Responding Sample answer: Manipulated Variable Max: Score 2 Element Lithium Sodium Potassium Variable Observation/Reactivity HOME 70 MASTERING PAPER 3 : THE SCORE Know to SCORE, sure to MASTER Paper 3 PART 3 PART 3 MASTERING PAPER 3 : THE SCORE END OF PART 3 Thank You KAMAL ARIFFIN BIN SAAIM SMK DATO’ BENTARA LUAR BATU PAHAT mel : kamal_ariffin2006@yahoo.com website: http://kemhawk.webs.com/ e- 73