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SPM Chemistry Paper 3 2010

PENSKORAN . SPM Chemistry Paper 3 2010. Question No. 1. Question No. 2. Question No. 3. [Click button to see the question]. CHEMISTRY PAPER 3 4541/3. 1. 2010. Question no. 1(a). Score 3: Able to RECORD all the pH value accurately. Sample answer. 2. 2010. Question no. 1(b).

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SPM Chemistry Paper 3 2010

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  1. PENSKORAN SPM Chemistry Paper 3 2010 Question No. 1 Question No. 2 Question No. 3 [Click button to see the question] CHEMISTRY PAPER 3 4541/3 1

  2. 2010 Question no. 1(a) Score 3: Able to RECORD all the pH value accurately Sample answer 2

  3. 2010 Question no. 1(b) Score 3: Able to state three correct observation with comparison Accept: [any correct observation based on laboratory experiment. Sample answer Notes: Colour of flame is not ‘comparison’ 3

  4. 2010 Question no. 1(c) Score : Able to state three inferences for experiment II Sample answer • Alkaline solution / potassium hydroxide formed • 2. Potassium (reacts with water) / (dissolves in water) • 3. White fume is potassium oxide • 4. The reaction is exothermic // heat is released • 5. Potassium is less dense than water • 6. Hydrogen gas is released • 7. Potassium is more reactive Note: REJECT ‘AKTIF’ 4

  5. 2010 Question no. 1(d) Score 3: Able to state an idea of hypothesis acurately Sample answer Going down / up Group1, the reactivity of metals increases / decreases Note: MV + RV + direction 5

  6. 2010 Question no. 1(e) Score 3: Able to give the operational accurately Sample answer What did you see Tendency 1. The bigger / brighter larger the flame, the more reactive is the metal when react with water What have been done 6

  7. 2010 Question no. 1(f)(i) Score 3: Able to give the three elements in ascending order of reactivity correctly Sample answer Lithium, sodium, potassium // Li, Na, K 7

  8. 2010 Question no. 1(f)(ii) Score 3: Able to give explanation by stating the following three information Sample answer • 1. Atomic size increases // Atomic radius increases // • The distance between nucleus and valence electron • increases • The nuclei attraction // attraction between nucleus and the valence electron becomes weaker • 3. Easier to donate / release / electron 8

  9. 2010 Question no. 1(d) Score 3: Able to predict three observationsbase on laboratory experiment correctly Sample Answer 1. The flame is bigger // Burns more brightly // produce flame 2. pH value of solution is [13.0 – 14.0] solution // [change in indicator colour] 3. Produce more fume // fume // smoke 4. Rubidium floats 9

  10. 2010 Question no. 2(a) Score 3: Able to state the three variables correctly Sample answer Manipulated variable: Type of solvent/solution // Solvent // water and methylbenzene Responding variable: Presence of effervescence // Effervescence or no effervescence // Reaction or no reaction Constant variable: Type of acid/ethanoic acid // metal/magnesium (Volume and concentration tidak diterima, kerana tidak menggangu eksperimen) 10

  11. 2010 Question no. 2(b) Score 3: Able to sketch the graph of volume of hydrogen gas against time Sample answer • The graph must have the following information: • The axes are labelled correctly • Correct unit • Curve shows the increase in volume Volume of hydrogen/gas (cm3) X-axis & Y-axis without unit : Score 2 Reverse axis, correct shape: Score 2 Reverse axis, wrong shape : Score 1 Time (minutes) 11

  12. 2010 Question no. 2(c) Score 3: Able to classify all acids correctly Sample answer If state reversible: Score 2 12

  13. 2010 Question no. 3(a) Score 2: Able to state the aim of the experiment correctly Sample answer To investigate the effect of catalyst on the rate of Reaction between metal and acid If state ‘Problem Statement’: Score 1 13

  14. 2010 Question no. 3(b) Score 3: Able to state three variables correctly Sample answer Manipulated variable: The present of catalyst // Catalyst // Copper(II) sulphate Responding variable: Rate of reaction // Total of volume of hydrogen gas evolved per minute/second // Volume of hydrogen gas evolved at [15-60 seconds] Constant variable: Temperature // Volume and concentration of acid // Concentration of acid // time taken // Mass/size of metal 14

  15. 2010 Question no. 3(c) Score 3: Able to state the relationship between manipulated variable and responding variable and the direction correctly Sample answer The presence of catalyst increases the rate of reaction MV RV direction Reverse RV and MV with direction : Score 2 Sample answer other than score 3 Catalyst affect the rate of reaction : Score 2 Catalyst affect the reaction : Score 1 15

  16. 2010 Question no. 3(d) Score 3: Able to list complete substances and apparatus USE DIAGRAM TO ‘VISUALISE’ THE PROCEDURE Burette Retort stand and clamp Deliver tube and stopper Conical flask Basin Zinc and HCl acid Water 16

  17. 2010 Question no. 3(d) Score 3: Able to list complete substances and apparatus Sample answer • Substances: • 1. Magnesium / zinc • 2. [0.1 – 0.2 mol dm-3 ] / dilute [hydrochloric acid] // • Nitric acid //sulphuric acid • Copper(II) sulphate • Water • Apparatus: • Stop watch 4. basin • Conical flask 5. retort stand • Measuring cylinder 6. delivery tube 17

  18. 2010 Question no. 3(e) Score 3: Able to state all the step in the procedure correctly Sample answer KEY WORD jangan lupa Procedure: • A burette/measuring cylinder isfilled with water and inverted over a basin containing water • 2. The initial burette reading is recorded • [2-5 g] Zinc/magnesium is placed in conical flask • [20-100 cm3 ] [dilute/0.1 mol dm3 ] hydrochloric acid is added into conical flask Ramai calon tak tulis 18

  19. 2010 Question no. 3(e) Score 3: Able to state all the step in the procedure correctly Sample answer KEY WORD jangan lupa Procedure: 4. [The conical flask is fitted with delivery tube] and stopwatch is started immediately 5. The burette reading is recorded are recorded at [10-60 seconds] intervals // Time taken [20-100 cm3 ] of gas is recorded // Volume of gas collected [0.5-3 minutes] is recorded 6. [2-5 g] Zinc/magnesium is placed in conical flask 7. Step 1 to 6 are repeated by adding copper(II) sulphate solution into the conical flask 19

  20. 2010 Question no. 3(f) Score 3: Able to present a table to record the following items correctly • Time (s) • 2. Burette reading (cm3 ) • Volume of gas (cm3 ) • Minimum three empty columns Sample answer Kalau ‘table’ dilukis sepadan dengan procedure : Score 3 20

  21. THE END Thank You KAMAL ARIFFIN BIN SAAIM SMK DATO’ BENTARA LUAR BATU PAHAT e-mel : kamal_ariffin2006@yahoo.com website: http://kemhawk.webs.com/ 21

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