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TRANSCRIPT
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BENGKEL KIMIA
KERTAS 4541/3(2011)
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1-2 STRUCTURED ITEMS
1 OPEN-ENDED RESPONSE
ITEM
ANSWER ALL QUESTIONS
50 MARKS
DURATION 90 MINUTES
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a) 1-2 SOALAN STRUKTUR :
(KK0501 KK0511)
b) 1 SOALAN ESEI :
(KK051201 KK051205)
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KK 501 - OBSERVING
USING THE SENSE OF
HEARING, TOUCH, SMELL,
TASTE AND SIGHT TO
COLLECT INFORMATION
ABOUT AN OBJECT OR APHENOMENON
ex. Q1b)
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1 BROWN SOLID IS FORMED
2 BUBBLES OF GAS RELEASED
3 ORANGE SOLUTION TURNS
GREEN. 4 THE INTENSITY OF BLUE COLOURED
SOLUTION REMAINS UNCHANGED/
INCREASE/ DECREASE
5 THE MASS INCREASE
6 YELLOW PRECIPITATE IS FORMED
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KK 0502 - CLASSIFYING
USING OBSERVATION TO
GROUP OBJECTS OREVENTS ACCORDING TO
SIMILARITIES OR
DIFFERENCES
Q2c
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1. CATIONS AND ANIONS
2. OXIDISING AGENTS AND REDUCING
AGENTS
3. OXIDATION AND REDUCTION
4. EXOTHERMIC AND ENDOTHERMIC
REACTIONS
5. ELECTROLYTES AND NON-
ELECTROLYTES
6. SATURATED AND UNSATURATED
HYDROCARBON
7. STRONG AND WEAK ACIDS/ ALKALIS
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KK 0503 MEASURING
AND USING NUMBERS
MAKING QUANTITATIVE
OBSERVATIONS USING
NUMBERS AND TOOLS WITHSTANDARDISED UNITS.
MEASURING MAKES
OBSERVATION MORE
ACCURATE.
Q1a
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Example
1. BALANCE MASS
2. BURETTE VOLUME OF SOLUTION
3. VOLTMETER VOLTAGE
4. STOPWATCH TIME
5. THERMOMETER TEMPERATURE
6. RULER DISTANCE/ HEIGHT/
LENGTH
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KK 0504 - INFERRING
USING PAST EXPERIENCES OR
PREVIOUSLY COLLECTED DATATO DRAW CONCLUSIONS AND
MAKE EXPLANATIONS OF
EVENTS
Q1c
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1. COPPER IS FORMED
2. O2
/H2
/CO2
IS LIBERATED/GIVENOUT/RELEASED
3. DICHROMATE(VI) ION IS REDUCEDTO Cr3+
4. THE CONCENTRATION OF Cu2+ INTHE SOLUTION REMAINSUNCHANGED/DECREASES/INCREASES
5. Mg REACTS WITH O2 TO FORM MgO
6. PbI2 IS FORMED AND INSOLUBLE INWATER
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KK 0505 - PREDICTING
STATING THE OUTCOME OF A
FUTURE EVENT BASED ONPRIOR KNOWLEDGE GAINED
THROUGH EXPERIENCES OR
COLLECTED DATA
Q1g
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1. PREDICT TIME TAKEN(FROM
A GRAPH)
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KK 0506 - COMMUNICATING
USING WORDS OR GRAPHIC
SYMBOLS SUCH AS TABLES,
GRAPHS, FIGURES OR MODELS
TO DESCRIBE AN ACTION,
OBJECT OR EVENT.
Q2b
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1. DRAW GRAPH
2. CONSTRUCT TABLE
3. WRITE EQUATION
4. ARRANGE METAL IN
DESCENDING ORDER OFELECTROPOSITIVITY
5. DRAW APPARATUS SET UP
6. DRAW ELECTRON STRUCTURE
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KK 0507 USING SPACE-
TIME RELATIONSHIP
DESCRIBING CHANGES IN
PARAMETER WITH TIME.EXAMPLES OF PARAMETERS
ARE LOCATION, DIRECTION,
SHAPE, SIZE, VOLUME, WEIGHTAND MASS.
Q1f(ii)
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1. STATE THE RELATIONSHIP
BETWEEN SIZE OF
REACTANT AND RATE OFREACTION
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KK 0508 INTERPRETING
DATA
GIVING RATIONALEXPLANATIONS ABOUT AN
OBJECT, EVENT OR PATTERN
DERIVED FROM COLLECTEDDATA.
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1. EXPLAIN WHY THERE IS NOCHANGE IN THE COLOUR
INTENSITY OF THE
SOLUTION
THE Cu2+
DISCHARGED AT THE
CATHODE IS REPLACED BY
THE IONISATION OF COPPERANODE.
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KK 0509 DEFININGOPERATIONALLY
DEFINING CONCEPTS BYDESCRIBING WHAT MUST BE
DONE AND WHAT SHOULD BE
OBSERVED.
Q1e
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1. WHEN BLUE LITMUS PAPER
TURNS RED, THE SOLUTIONFORMED SHOWS ACIDIC
PROPERTY
2. ELASTICITYOF RUBBER ISTHE DIFFERENCE BETWEEN
THE LENGTH AFTER THE
WEIGHT USED TO STRETCHIT IS REMOVED AND THE
ORIGINAL LENGTH
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KK 0510 CONTROLLING
VARIABLES
IDENTIFYING THE FIXED
VARIABLES, MANIPULATED
VARIABLE AND RESPONDING
VARIABLE IN AN INVESTIGATION.
THE MANIPULATED VARIABLE ISCHANGED TO OBSERVE ITS
RELATIONSHIP WITH THE
RESPONDING VARIABLE. AT THESAME TIME, THE FIXED VARIABLES
ARE KEPT CONSTANT.
Q2a
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MANIPULATED VARIABLE SIZEOF REACTANT
RESPONDING VARIABLE
TIMETAKEN TO COLLECT 20 cm3 OFGAS
FIXED VARIABLE
CONCENTRATION OF ACID
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KK 0511 - HYPOTHESISING
MAKING A GENERAL STATEMENTABOUT THE RELATIONSHIP
BETWEEN A MANIPULATEDVARIABLEAND A RESPONDINGVARIABLEIN ORDER TO EXPLAIN ANEVENT OR OBSERVATION. THIS
STATEMENT CAN BE TESTED TODETERMINE ITS VALIDITY.
Q1d
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THE SMALLERTHE SIZE OF
REACTANT, THE SHORTERTHETIME TAKEN TO COLLECT 20 cm3OF GAS
THE FURTHER THE DISTANCEBETWEEN TWO METALS IN THE
ELECTROCHEMICAL SERIES, THEHIGHER IS THE VOLTAGE OF THECELL PRODUCED
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KK 1512 PLANNING
EXPERIMENT
AIM/ PROBLEM STATEMENT
VARIABLESHYPOTHESIS
APPARATUS AND MATERIALS
PROCEDURE
TABULATION OF DATA
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CHEMISTRY 4541
PAPER 3
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PLANNING OF EXPERIMENT
Students are required to study asituationor a given task.
Based on the situation or the giventask, students are required toplan
an experimentto investigate thesituation or the given task
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The answer should include :
Problem statement/aim
HypothesisList all the variables
List of materials and apparatus
(Draw the set up of apparatus tohelp you in procedure as well aslist of materials and apparatus)
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The answer should include :
Procedure
Tabulation Data.
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1 Statement of problem Able to make astatement of the
problem accurately andmust be inquestionform
2 All the variables Able to stateall thethree variablescorrectly
3 Hypothesis Able to state therelationshipbetweenmanipulatedvariableandresponding
variable correctly
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4 List of materials and
apparatus
Able to state the listof substances andapparatus correctlyandcompletely
5 Procedure Able to state acompleteexperimentalprocedure
6 Tabulation of data Able to exhibit the
tabulation of datacorrectly with suitableheadingsand units
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You need to do or think ofDo question 3 in 45 minutes
Do not leave empty answers
Label the table with unit but need
not be filled with data
Write the plan for the experimentsimilar to what you would do when
writing a PEKA CHEMISTRY report.
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ANSWERS (Form 4)
1a) [Observing]Able to record all the four readingscorrectly with one decimal place.
Answer
Voltage/ V
Voltan /V
2.71.10.82.0
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1b) [Controlling Variables]
Able to stateall threevariables correctly Sample answer
Manipulated variable : Pair of metals // W,
X, Y and Z
Responding variable : Voltmeter reading// voltage//Potential difference
Fixed variable : Copper(II)
sulphate solution //voltmeter //
Copper
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1c) [Hypothesising]
Able to suggest a correct relationshipbetween theMVand theRVwithdirection
Sample answer
The further the distance between two
metals in the electrochemical series, thehigher is the voltage / the voltmeter
reading
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1d) [Interpreting Data]
Able to arrange the position of all metals correctly
Sample answer
Y , Cu , X , Z , W
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1e) [Predicting]
Able to predict the voltage withunit correctly
Sample answer1.9 V
1f) [Ob ti d I f i ]
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Able to state three observations and threecorrect their corresponding inferences
Sample answer
1f) [Observation and Inferring]
Observation
Pemerhatian
Inference
Inferens
1. Magnesium dissolves //becomes thinner
1. Magnesium is oxidised// loses electron to
from Mg2+ // Mg
change to Mg2+
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2. (Brown) solid is
deposited at copper
// Copper becomesthicker
2. Copper is formed //
Cu2+ discharged //
Cu2+ change to Cu
3. Voltmeter needle
deflected //Deflection of
voltmeter needle
decreases
3. Electricity
produced //electrons flow //
Electricity produced
decreases4. The intensity of blue
colour solution
deceases
4. The concentration
of Cu2+ in the solution
decreases
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Able to describe (1) what should be done and(2) what should be observed
correctly
Sample answer1. Dip two different types of metals into CuSO4solution and connect them to voltmeter
2. Mg becomes thinner and brown solid isdeposited at copper//
Voltmeter needle deflected//Reading of voltmeter
decreases.
1g) [Defining Operationally]
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ANSWERS WITH IN CORRECT TERMS, WORDS ORINCORRECT KEY WORDS.
NO. INCORRECT TERMS[TIDAK TEPAT]
CORRECT TERMS[TEPAT]
1. Chocolate precipitate[Mendakan coklat]
2. A stable atom[Atom yang stabil]
3. Electron configuration[Konfigurasi electron]
Brown precipitate
Atom that achieves octetarrangement
Electron arrangement
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NO. INCORRECT TERMS[TIDAK TEPAT]
CORRECT TERMS[TEPAT]
4. Clear solution[Larutan jernih]
5 Iodide ion stop reacted or
reaction stops.[ion iodida bertindak balasdengan lengkap]
6. Reaction does not occur[Tindakbalas tidak berlaku]
Colourlesssolution
All iodide ions
have reactedcompletely
No change inreaction
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NO. INCORRECT TERMS[TIDAK TEPAT]
CORRECT TERMS[TEPAT]
7. Hasten the rate of reaction[Mempercepatkan kadartindakbalas]
8. Burning in oxygen[Pembakaran karbon]9. Magnesium is more active
than zinc[Magnesium lebih aktifdaripada zink]
The rate ofreaction increases
Heating in oxygen
Magnesium is
more reactive thanzinc
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NO. INCORRECT TERMS[TIDAK TEPAT]
CORRECT TERMS[TEPAT]
10. ECS11. In the electrochemical series,
magnesium is more reactivethan zinc[Untuk siri elektrokimia,
magnesium lebih reaktifdaripada zink]
12 In the reactivity series,magnesium is more
electropositive than zinc[Untuk siri kereaktifan,magnesium lebih elektropositifdaripada zink]
Electrochemical
series
In the electrochemicalseries, magnesium is
more electropositivethan zinc
In the reactivity
series, magnesium ismore reactive thanzinc
NO INCORRECT TERMS CORRECT TERMS
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NO. INCORRECT TERMS CORRECT TERMS13 Add ammonia.
Add iodine.Add sodium hydroxide
Add silver nitrate[Campurkan ammonia,cmpurkan iodine,campurkan natrium hidroksida,campurkan argentum nitrat]
14 Potassium permanganatesolution[Larutan kalium permanganate]
15 Polistirene prevents heat loss.Polistirene can avoid heat loss.[Polistirena adalah penghalanghaba,Polistirena dapat mencegahkehilangan haba]
Polystyrene reducesheat loss
Acidified potassiummanganate(VII) solution
Add ammonia solution.
Add iodine solution.
Add sodium hydroxidesolution.
Add silver nitratesolution
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NO. INCORRECT TERMS CORRECT TERMS16 Melting point is the point where
solid changes to liquid.[Takat lebur ialah takat dimanapepejal berubah menjadicecair]
17 Conduct electric[Mengkonduksikan elektrik]
18 Saponification is a process ofmaking soap by hydrolysisprocess.[Saponifikasi ialah prosesmembuat sabun secarahidrolisis]
Saponification is a
process of makingsoap by hydrolysisof an ester
Conduct electricity
Melting point is thetemperature where
solid starts to changeto liquid
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NO. INCORRECT TERMS CORRECT TERMS19 Outermost number of electrons
[Bilangan electron terluar]20 The function of the salt bridge is
to complete the circuit and toseparate two solutions.[Fungsi titian garam ialahmelengkapkan litar danmengasingkan larutan]
21 Sodium donates electron[Natrium menderma electron] Sodium atom donates
one electron
The function of the saltbridge is to complete theelectric circuit whichallows ions to move
The number of electrons
in the outermost shellfilled with electron