penskoran paper 3 2010

7/28/2019 Penskoran Paper 3 2010

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SPM Chemistry Paper 3 2010

1CHEMISTRY PAPER 3 4541/3

Question No. 1

Question No. 2

[Click button to see the question]

Question No. 3

PENSKORAN
http://e/1%20Kamal/My%20Chemistry/13%20My%20Program%20Kecemerlangan/2011/SPM%202010.dochttp://e/1%20Kamal/My%20Chemistry/13%20My%20Program%20Kecemerlangan/2011/SPM%202010.dochttp://e/1%20Kamal/My%20Chemistry/13%20My%20Program%20Kecemerlangan/2011/SPM%202010.doc


2/21

2010

Question no. 1(a)

Score 3: Able to RECORD all the pH value accurately

Experiment I 13.0

Experiment II 13.1

Experiment III 13.0

Sample answer

2
http://localhost/var/www/apps/conversion/tmp/scratch_7/SPM%202008.doc


3/21

2010

Question no. 1(b)

Score 3: Able to state three correct observationwith comparison

Accept: [any correct observation based on laboratory experiment.

Sample answer

3

Experiment ObservationI Effervescence / bubbles //

white fumes

II Brighter flame // more (white fumes)/

effervescence than experiment IIIIII Flame/more (white fumes)/effervescence

Notes: Colour of flame is not comparison


4/21

2010

Question no. 1(c)

Score : Able to state three inferences for experiment II

Sample answer

1. 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


5/21

2010

Question no. 1(d)

Score 3: Able to state an idea of hypothesis acuratelySample answer

Going down / up Group1, the reactivity

of metals increases / decreases

5

Note: MV + RV + direction


6/21


7/21

2010

Question no. 1(f)(i)

Score 3: Able to give the three elements in ascendingorder of reactivity correctly

Sample answer

Lithium, sodium, potassium //

Li, Na, K

7


8/21

2010

Sample answer

1. Atomic size increases // Atomic radius increases //

The distance between nucleus and valence electronincreases

2. The nuclei attraction // attraction between nucleus and

the valence electron becomes weaker

3. Easier to donate / release / electron

8

Question no. 1(f)(ii)

Score 3: Able to give explanation by stating thefollowingthree information


9/21

2010

Question no. 1(d)

Score 3: Able to predictthree observationsbase onlaboratory experiment correctly

Sample Answer

9

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


10/21

2010

Question no. 2(a)

Score 3: Able to state the three variables correctlySample answer

10

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)


11/21

2010

Question no. 2(b)

Score 3: Able to sketch the graph of volume ofhydrogen gas against time

Sample answer

11

The graph must have the

following information:

1. The axes are labelled

correctly2. Correct unit

3. Curve shows the

increase in volume

Volume of hydrogen/gas (cm3)

Time (minutes)

X-axis & Y-axis without unit : Score 2Reverse axis, correct shape: Score 2Reverse axis, wrong shape : Score 1


12/21

2010

Question no. 2(c)

Score 3: Able to classify all acids correctly

Sample answer

12

Strong Acid Weak acid

Sulphuric acid

Nitric acid

Hydrochloric acid

Ethanoic acid

If state reversible: Score 2


13/21

2010

Question no. 3(a)

Score 2: Able to state the aim of the experiment correctly

Sample answer

13

To investigate the effect of catalyst on the rate of

Reaction between metal and acid

If state Problem Statement: Score 1


14/21

2010

Question no. 3(b)

Score 3: Able to state three variables correctly

Sample answer

14

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


15/21

2010

Question no. 3(c)

Sample answer

15

The presence of catalyst increases the rate of reaction

Score 3: Able to state the relationship between manipulated

variable and responding variable and the directioncorrectly

Catalyst affect the rate of reaction : Score 2

Reverse RV and MV with direction : Score 2

Catalyst affect the reaction : Score 1

Sample answer other than score 3

MV RVdirection


16/21

2010

Question no. 3(d)

Score 3: Able to list complete substances and apparatus

16

Burette

Retort stand

and clamp

WaterZinc and

HCl acid

Deliver tube

and stopper

USE DIAGRAM TOVISUALISE THE

PROCEDURE

BasinConical flask


17/21

2010

Question no. 3(d)

Score 3: Able to list complete substances and apparatus

Sample answer

17

Substances:

1. Magnesium / zinc

2. [0.1 0.2 mol dm-3 ] / dilute [hydrochloric acid] //

Nitric acid //sulphuric acid

3. Copper(II) sulphate

4. Water

Apparatus:1. Stop watch 4. basin

2. Conical flask 5. retort stand

3. Measuring cylinder 6. delivery tube


18/21

2010

Score 3: Able to state all the step in the procedure correctly

Sample answer

18

1. A burette/measuring cylinder is filled with water and

inverted over a basin containing water

2. The initial burette reading is recorded

3. [2-5 g] Zinc/magnesium is placed in conical flask

4. [20-100 cm3 ] [dilute/0.1 mol dm3 ] hydrochloric acid is

added into conical flask

Question no. 3(e)

KEY WORD jangan lupaProcedure:

Ramai calon tak tulis


19/21

2010

Score 3: Able to state all the step in the procedure correctly

Sample answer

19

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 recorded6. [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

Question no. 3(e)

KEY WORD jangan lupaProcedure:


20/21

2010

Score 3: Able to present a table to record the following

items correctly

Sample answer

20

Question no. 3(f)

1. Time (s)

2. Burette reading (cm3 )

3. Volume of gas (cm3 )

4. Minimum three empty columns

Time (s)

Burette reading (cm3 )

Volume of hydrogen gas (cm3 )

Kalau table dilukis sepadan dengan procedure : Score 3


21/2121

Thank You

THE END

KAMAL ARIFFIN BIN SAAIMSMK DATO BENTARA LUAR BATU PAHAT

e-mel : [email protected]

website: http://kemhawk.webs.com/
mailto:[email protected]:[email protected]

penskoran paper 3 2010

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