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WHAT YOU MUST KNOW ABOUT CHEMISTRY PAPER 3

PART 3. WHAT YOU MUST KNOW ABOUT CHEMISTRY PAPER 3. MASTERING PAPER 3 : THE SCORE. To Score Paper 3 is To Tackle Paper 3.

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WHAT YOU MUST KNOW ABOUT CHEMISTRY PAPER 3

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  1. PART 3 WHAT YOU MUST KNOW ABOUT CHEMISTRY PAPER 3 MASTERING PAPER 3 : 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/ 1

  2. PART 3 Past SPM Question Scoring YEAR: 2005 YEAR: 2006 YEAR: 2007 YEAR: 2004 No. 1 No. 2 YEAR: 2003 YEAR: 2008 No. 1 No. 2 CHEMISTRY PAPER 3 4541/3 2

  3. PART 3 Past SPM Question Scoring Scoring SPM Paper 3 2007 Question No. 1 Question No. 2 [Click button to see the question] CHEMISTRY PAPER 3 4541/3 3

  4. 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: 4 CHEMISTRY PAPER 3 4541/3

  5. PART 3 SPM 2007 Question no. 1 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 5 CHEMISTRY PAPER 3 4541/3

  6. PART 3 SPM 2007 Question no. 1 Tips to write a good report: Sample answer: 6 CHEMISTRY PAPER 3 4541/3

  7. 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: 7 CHEMISTRY PAPER 3 4541/3

  8. PART 3 SPM 2007 Question no. 1 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 8 CHEMISTRY PAPER 3 4541/3

  9. PART 3 SPM 2007 Question no. 1 Tips to write a good report: 1(b)(ii) :Able to state the hypothesis accurately • Sample answer: • 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 9 CHEMISTRY PAPER 3 4541/3

  10. PART 3 SPM 2007 Question no. 1 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: • Heat/energy is absorbed // Endothermic reaction • The energy in product is more than the energy in • reactants • The heat/energy absorbed during bond breaking • is greater than the heat/energy released during • the bond making. 10 CHEMISTRY PAPER 3 4541/3

  11. PART 3 SPM 2007 Question no. 1 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 11 CHEMISTRY PAPER 3 4541/3

  12. PART 3 SPM 2007 Question no. 1 Tips to write a good report: 1(d) : Able to predict the three temperature readings correctly. Sample answer: 1. Sulphuric acid 37 oC 2. Nitric acid 32 oC 3. Ethanoic acid 28 – 31 oC 12 CHEMISTRY PAPER 3 4541/3

  13. PART 3 SPM 2007 Question no. 1 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. 13 CHEMISTRY PAPER 3 4541/3

  14. PART 3 SPM 2007 Question no. 1 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. 14 CHEMISTRY PAPER 3 4541/3

  15. PART 3 SPM 2007 Question no. 1 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 15 CHEMISTRY PAPER 3 4541/3

  16. PART 3 SPM 2007 Question no. 1 Tips to write a good report: Sample answer: Volume of CO2 / cm3 Time / minute 16 CHEMISTRY PAPER 3 4541/3

  17. PART 3 SPM 2007 Question no. 2 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. 17 CHEMISTRY PAPER 3 4541/3

  18. 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 18

  19. 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 19

  20. 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 : Electrolyte /name CHEMISTRY PAPER 3 4541/3 20

  21. 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 21

  22. 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 22

  23. 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 23

  24. 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 24

  25. PART 3 Not Suggested Answers: 6. Procedures: use simple sentences, passive or active voice, use keywords, sequence CHEMISTRY PAPER 3 4541/3 25

  26. PART 3 Suggested Answers: • Pour the copper sulphate into a beaker. • Clean aluminium and copper with sand paper. • Dip aluminium and copper into the solution. • Connect it to the voltmeter // complete the circuit. • Record the voltmeter reading. • Repeat steps 1-5 / experiment by substituting aluminium with zinc / one metal for another. 26 CHEMISTRY PAPER 3 4541/3

  27. PART 3 SPM 2007 Question no. 2 Tips to write a good report: 7. Tabulation: heading for manipulated and responding variables, units, Responding Variable Manipulated Variable HOME Max: Score 2 27 CHEMISTRY PAPER 3 4541/3

  28. PART 3 Past SPM Question Scoring Scoring SPM Paper 3 2008 Question No. 1 Question No. 2 [Click button to see the question] CHEMISTRY PAPER 3 4541/3 28

  29. PART 3 SPM 2008 Question no. 1 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 29

  30. PART 4 SPM 2008 Question no. 1 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 30

  31. 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: Or CHEMISTRY PAPER 3 4541/3 31

  32. PART 4 SPM 2008 Question no. 1 Tips to write a good report: 1(d): Able to state all correct observations, one from each set. Sample answer: Set I : 1. Latex coagulates 2. A solid lump is formed Set II: 1. Latex does not coagulate 2. No change 3. Liquid Set III: 1. Latex coagulates 2. Solid lump is formed 32 CHEMISTRY PAPER 3 4541/3

  33. PART 4 SPM 2008 Question no. 1 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 33 CHEMISTRY PAPER 3 4541/3

  34. PART 4 SPM 2008 Question no. 1 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: Volume of latex/acid/(ammonia solution)/alkali//latex// temperature 34 CHEMISTRY PAPER 3 4541/3

  35. PART 4 SPM 2008 Question no. 1 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 35 CHEMISTRY PAPER 3 4541/3

  36. PART 4 SPM 2008 Question no. 1 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) 36 CHEMISTRY PAPER 3 4541/3

  37. PART 4 SPM 2008 Question no. 1 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. 37 CHEMISTRY PAPER 3 4541/3

  38. PART 4 SPM 2008 Question no. 1 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] 38 CHEMISTRY PAPER 3 4541/3

  39. 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: Total marks: 33 Home 39 CHEMISTRY PAPER 3 4541/3

  40. PART 3 SPM 2008 Question no. 2 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. 40

  41. 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 41 CHEMISTRY PAPER 3 4541/3

  42. 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 : Temperature / size of alkali metal 42 CHEMISTRY PAPER 3 4541/3

  43. 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. 43 CHEMISTRY PAPER 3 4541/3

  44. 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, 44 CHEMISTRY PAPER 3 4541/3

  45. PART 3 SPM 2008 Question no. 2 Tips to write a good report: e. Procedure : List all the steps correctly • Sample answer: • Fill the water trough with water • Cut piece of lithium using a knife and forceps • Dry the lithium using filter paper • Place the lithium on the surface of water • Record all the changes / observation • Repeat (step 1 to 5) / experiment using • sodium and potassium 45 CHEMISTRY PAPER 3 4541/3

  46. PART 3 SPM 2008 Question no. 2 Tips to write a good report: e. Procedure : List all the steps correctly • Sample answer: • Fill the water trough with water • Cut piece of lithium using a knife and forceps • Dry the lithium using filter paper • Place the lithium on the surface of water • Record all the changes / observation • Repeat (step 1 to 5) / experiment using • sodium and potassium 46 CHEMISTRY PAPER 3 4541/3

  47. 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 Variable Sample answer: Manipulated Variable HOME Max: Score 2 47

  48. MASTERING PAPER 3 : THE SCORE Know to SCORE, sure to MASTER Paper 3

  49. PART 3 MASTERING PAPER 3 : THE SCORE END OF PART 3 Thank You KAMAL ARIFFIN BIN SAAIM SMK DATO’ BENTARA LUAR BATU PAHAT e-mel : kamal_ariffin2006@yahoo.com website: http://kemhawk.webs.com/ 49

  50. PART 3 BE THE BEST BEAT THE REST

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