basic education
Department:
Basic Education
REPUBLIC OF SOUTH AFRICA
SENIOR CERTIFICATE EXAMINATION
PHYSICAL SCIENCE P2
CHEMISTRY
HIGHER GRADE
2012
MARKS: 200
PHYSICAL SCIENCE HG: Paper 2 USS oT
3041E
30412E
This question paper consists of 15 pages, 4 data sheets and 1 answer sheet.
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Physical Sciences Grade 12 P2 NSC June 2012 QP (Eng)
Grade 12 Physical Sciences Paper 2 question paper from the NSC June 2012 (English), 25 pages. Read online or download the free PDF.
Physical Sciences · Grade 12 · NSC June · 2012 · English. Question paper, 25 pages. Read online or download the PDF.
- Subject
- Physical Sciences
- Grade
- Grade 12
- Language
- English
- Document type
- Question paper
- Year
- 2012
- Exam period
- NSC June
- Paper
- 2
- Curriculum
- CAPS
- Pages
- 25
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Physical Science/HG/P2 2 DBE/2012
SCE
INSTRUCTIONS AND INFORMATION
ile
Write your centre number and examination number in the appropriate spaces
on the ANSWER BOOK.
2. Answer ALL the questions.
3. You may use a non-programmable calculator.
4. You may use appropriate mathematical instruments.
5. Data sheets and a periodic table are attached for your use.
6. Marks may be forfeited if instructions are not followed.
QUESTION 1
INSTRUCTIONS AND INFORMATION
ib
Answer this question on the attached ANSWER SHEET. Write your centre
number and examination number in the appropriate spaces.
Various options are given as possible answers to the following questions.
Choose the answer and make a cross (X) over the block (A-D) next to the
question number (1.1-1.15) on the ANSWER SHEET.
Do not make any other marks on the ANSWER SHEET. Any calculations or
writing that may be necessary when answering this question should be done
in the ANSWER BOOK and must be deleted clearly by means of a line drawn
across the page.
If more than ONE block is marked per question, no marks will be awarded for
that answer.
PLACE THE COMPLETED ANSWER SHEET INSIDE THE FRONT COVER OF THE
ANSWER BOOK.
EXAMPLE:
QUESTION: The symbol for the SI unit of time is ...
ANSWER: A|B D
wen iP -2
30s 5
Copyrant reserved CEI AAAY OO deebidiniiad
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Physical Science/HG/P2 3 DBE/2012
SCE
1.1 The volume of a certain mass of gas is V. The kelvin temperature of the gas is
then doubled and the pressure is halved. The volume of the gas will now
be the following:
A 4V
B 2V
Cc Vv
D *%V (4)
1.2 Which ONE of the graphs below is the correct representation of the
relationship between the volume (V) and the absolute temperature (T) of a
REAL gas?
Lo : ZZ
0
U T
D
Vv : Vv
0
0
T T
1.3 A solid X does not conduct ereotricity. When X MELTS at 113 °C it still does
not conduct electricity. X could be ..
(4)
A potassium iodide.
B_ diamond.
C_ potassium.
D_ iodine. (4)
comes ta
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Physical Science/HG/P2 4 DBE/2012
SCE
1.4 Which ONE of the following sets of properties is characteristic of hydrogen
sulphide (H2S)?
A Acidic in solution, non-poisonous
B Unpleasant smell, poisonous
C Basic in solution, an oxidising agent
D_ An oxidising agent, unpleasant smell (4)
1.5 SO2(g) is bubbled through an aqueous solution of potassium dichromate.
Which ONE of the following statements is CORRECT?
A Orange solution turns green and SO; is oxidised to free sulphur.
B_ Orange solution turns green and Cr207" is oxidised to Cr°* ions.
C Orange solution turns green and Cr207* is reduced to Cr** ions.
D Green solution turns orange and Cr20;* is oxidised to Cr* ions. (4)
1.6 Consider the following solutions of hydrochloric acid:
SOLUTION A SOLUTION B
0,1 mol.dm? hydrochloric acid 1,0 mol.dm® hydrochloric acid
Which ONE of the following statements about the solutions is CORRECT?
A Ais aweaker acid than B and more dilute.
B_ Ais more dilute than B but a stronger acid.
C_ Ais aweaker acid than B but more concentrated.
D_ Ais less concentrated than B and both A and B are strong acids. (4)
1.7 Concentrated sulphuric acid is added to potassium nitrate, and a reaction
takes place according to the following equation:
H2SO,(2) + KNO3(s) = KHSO,(s) + HNO3(g)
Which ONE of the following is a conjugate acid-base pair in this reaction?
A H2SO,4 and SO,”
B HNO3 and NO3
C HsSO,4 and KNO3
D HSO, and NOs (4)
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Physical Science/HG/P2 5 DBE/2012
SCE
1.8 Hydrogen gas is formed when an excess of HC£ reacts with Zn. Which ONE
1.9
of the following graphs of volume of hydrogen gas versus time best
represents the volume of the gas formed until the zinc is completely used up?
A
A
V
(cm?) (on? )
time (s) time (s)
c A
Vv a
(cm?) on
{_________»
time (s) time (s)
(4)
In which ONE of the following equilibrium reactions in a closed container is
the yield of products favoured by increasing the pressure of the reaction
mixture?
A 2NO(g) + Ch(g) = 2NOCL(g)
B CO(g) + H20(g) = CO2(g) + Hag)
C 2803(g) = 2S02(g) + O2(g)
D PCts(g) = PC&(g) + Chg) 4)
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Physical Science/HG/P2 6 DBE/2012
SCE
1.10 Consider the following equation of a reversible reaction at equilibrium:
2CrO,7 (aq) + 2H* (aq) = Cr207?(aq) + H20(2) AH<O
yellow orange
Which set of changes below would favour the mixture to change from yellow
to orange?
Temperature pH
A Decrease Increase
B_ Decrease Decrease
C_ Increase Increase
D_ Increase Decrease (4)
1.11 Which ONE of the following redox reactions will NOT occur spontaneously?
(HINT: Use the table of standard reduction potentials to help you.)
A Iron nail in a copper(II)sulphate (CuSO,) solution
B Magnesium ribbon in a copper(II)nitrate (Cu(NOs3)2) solution
C Copper metal turnings in a silver(I)nitrate (AgNO3) solution
D Copper metal turnings in a cobalt(II)chloride (CoC£,) solution (4)
ae An Mg”*/Mg half cell and a Fe**/Fe half cell are combined under standard
conditions to form an electrochemical cell. A spontaneous reaction occurs.
The reaction occurring at the anode of the cell is ...
A Fe—Fe™ +3e
B Mg — Mg” + 2e°
C Fe*+3e — Fe
D Mg** + 2e > Mg (4)
co resoves NLL A ia
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Physical Science/HG/P2 7 DBE/2012
SCE
1.13 The cell notation of an electrochemical cell is:
Mg(s)/Mg**(aq) ||Cu*(aq)|Cu(s)
When a learner sets up this cell he measures an emf of 1,20 V instead of the
1,27 V that would be measured at standard conditions.
Which ONE of the following factors is most probably responsible for this
difference?
A. The size of the copper electrode
B_ The volume of the Cu2*(aq) solution
C_ The concentration of the Cu**(aq) solution
D
The concentration of the solution in the salt bridge (4)
1.14 Which ONE of the following gases will NOT decolourise a bromine solution
through an addition reaction?
A Ethene
B_ Ethane
C Ethyne
D_ Chloroethene (4)
1.15 The formula of a saturated hydrocarbon is ...
A C4He
CH30H
CaHi0
C4Hs (4)
[60]
00 8
Contos JANA AAU VAIN 2356 toe
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Physical Science/HG/P2 8 DBE/2012
SCE
ANSWER QUESTIONS 2-9 IN THE ANSWER BOOK.
INSTRUCTIONS AND INFORMATION
1. Start EACH question on a NEW page in the ANSWER BOOK.
72, Leave ONE line between two subquestions, for example between
QUESTION 2.1 and QUESTION 2.2.
3. Show the formulae and substitutions in ALL calculations.
4. Number the answers exactly the same as the questions.
QUESTION 2 (START ON A NEW PAGE.)
2.1 The graph below shows the melting points of four solid hydrogen halides.
=
fo}
Qa
Lo?)
&
oO
=o
2.1.1 Name the intermolecular forces present in HF. (2)
2.1.2 Name the intermolecular forces present in HBr. (2)
A Explain the difference in the melting points between HBr and HC2. (2)
dalled CATARINA leaebeiniidl
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Physical Science/HG/P2 9 DBE/2012
SCE
2.2 Two learners, A and B, investigate the relationship between the temperature
and pressure of an enclosed gas.
The learners used different samples of SO2(g) in two identical containers with
a fixed volume of 1 dm’. Their results (A and B) were plotted on the same
set of axes, as indicated below.
a
A
a. i. (
7 100 | B
Bw 100 f------------ ‘
no ' 1
a i ,
50
298 x
Temperature (K)
2.2.1 Write down the mathematical relationship between p and T that
can be deduced from the graph. (2)
2.2.2 Make use of the relationship in QUESTION 2.2.1 and determine
the value of the temperature X on the above graph. (4)
2.2.3 Determine the mass of SO2(g) used by learner A. (6)
2.2.4 Give a possible reason why the graph obtained by learner B has a
smaller gradient than the graph obtained by learner A. (2)
[20]
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Physical Science/HG/P2 10 DBE/2012
SCE
QUESTION 3 (START ON A NEW PAGE.)
3.1
3.2
3.3
Sulphur dioxide gas is prepared in the laboratory by means of the reaction
between sulphuric acid and a metal sulphite.
The sulphur dioxide gas is now passed over a white filter paper dipped in an
aqueous potassium permanganate solution.
27 What colour change will you observe when the gas is passed over
the filter paper?
3.1.2 Does the sulphur dioxide act as a reducing agent or an oxidising
agent when it reacts with potassium permanganate?
77 Give a reason for your answer to QUESTION 3.1.2.
Acid rain is a result of the dissolving of atmospheric pollutants like SO2(g) in
rain water.
3.1.4 Write down a balanced equation to show how SOz2(g) reacts with
water.
Chlorine gas is prepared in the laboratory and then bubbled through water to
which a few drops of the indicator bromothymol blue were added.
Bromothymol blue is yellow in an acid and blue in a base.
3.2.1 Write a balanced equation for the reaction that occurs when
chlorine is bubbled through water.
It is observed that when the chlorine gas is bubbled through the water
containing the bromothymol blue, the solution turns yellow. However, after a
while the yellow solution becomes colourless.
3.2.2 Is the pH of the initial yellow solution LARGER THAN or SMALLER
THAN 7?
3.2.3 Give a reason for the change in colour from yellow to colourless.
Sandile must prepare nitrogen dioxide gas in the laboratory. He places copper
turnings in a test tube and adds nitric acid. He expects to find a reddish brown
gas to be liberated. However, a colourless gas is formed.
3.3.1 Was the nitric acid that Sandile added dilute of concentrated?
3.3.2 Make use of the table of Standard Reduction Potentials and write
down the equation of the half reaction that explains the formation of
the colourless gas.
3.3.3 When some water is added, the solution in the test tube turns to a
blue colour. Write down the FORMULA of the substance
responsible for the blue colour.
Conrintosomed YIU A Peco rr
(2)
(2)
(3)
(3)
(1)
(2)
(2)
(2)
(2)
[20]
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Physical Science/HG/P2 11 DBE/2012
SCE
QUESTION 4 (START ON A NEW PAGE.)
Ammonia is prepared in the laboratory by making use of Ca(OH).
4.1 Write down a balanced equation for the preparation of ammonia.
4.2 How is the ammonia collected when it forms?
Write only: UPWARD DISPLACEMENT OF AIR, DOWNWARD
DISPLACEMENT OF AIR or DOWNWARD DISPLACEMENT OF WATER.
4.3 Give TWO reasons for the answer to QUESTION 4.2.
The cap of a bottle of pool acid (hydrochloric acid) is covered with a white crystalline
substance when left next to a bottle of Handy Andy (ammonia) cleaner.
44 Write a balanced equation that will explain the formation of the white
crystalline substance.
QUESTION 5 (START ON A NEW PAGE.)
The decomposition of hydrogen peroxide can be accelerated by the catalyst
manganese dioxide. The peroxide rapidly decomposes to oxygen and water.
MnOz(s)
2H202(aq) —___» O2(g) + 2H20(2)
5.1 Refer to the activation energy to explain the function of the MnO2.
5.2 A graph is drawn for the mass of the peroxide solution against time for the
decomposition.
A
210
208
206
204
Mass of H2O2 (g)
Experiment 1
202 :
(3)
(2)
(2)
(3)
[10]
(2)
200
0 10 20 30 40 50 60 70 80 90 100
Time (s)
5.2.1 What does the HORIZONTAL SECTION of the graph after
70 seconds indicate?
5.2.2 Why does the mass of the solution decrease with time?
co roomed NN aaa
Ae
(2)
(2)
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Physical Science/HG/P2 12 DBE/2012
SCE
5.2.3 During which ONE of the following time intervals was the rate of
the reaction the highest?
(Choose from 5—15 seconds, 15—25 seconds or 25-35 seconds)
5.2.4 Give a reason for your answer to QUESTION 5.2.3.
The experiment is now repeated (experiment 2) by using the same
mass of H2O2 but MnO,(s) was OMITTED from the reactor vessel.
5.2.5 Draw the same set of axes in your ANSWER BOOK. The values on
the axes are not required. Now redraw the graph for experiment 1.
Draw the graph for this experiment (without MnOz2) on the same set
of axes. Label it as EXPERIMENT 2.
5.2.6 On the same axes, draw a graph of the mass against time for
the reaction that will take place if the peroxide solution was
HEATED prior to the adding of manganese dioxide. Label it as
EXPERIMENT 3.
QUESTION 6 (START ON A NEW PAGE.)
6.1
6.2
6.3
con rosomed NA A peat
In a reaction 8,0 moles of SO2 gas and 5,0 moles of Oz gas are placed in a
2,0 dm* empty container and sealed. Equilibrium is established at a specific
temperature. The equilibrium reaction equation is shown below:
2S02(g) + O2x(g) = 2S03(g)
At equilibrium 6,0 moles of SO3(g) are present in the container. Calculate the
K, value at this specific temperature.
After a period of time the temperature is increased and an analysis showed
that the K, value decreases. Is the forward reaction exothermic or
endothermic?
Make use of Le Chatelier's principle to give an explanation for your answer to
QUESTION 6.2.
(2)
(2)
(3)
(3)
[16]
(7)
(1)
(3)
[11]
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Physical Science/HG/P2 13 DBE/2012
SCE
QUESTION 7 (START ON A NEW PAGE.)
7.1 The acid HF ionises according to the following equation:
HF(aq) = H*(aq) + F (aq)
When a 0,10 mol.dm® solution of HF is prepared, it is found that the
concentration of the F~ (aq) ions is 0,018 mol.dm®. The temperature of the
solution is 25 °C.
a Is HF a strong acid? (Write down only YES or NO.) (1)
7.1.2 Give a reason for the answer to QUESTION 7.1.1. (2)
(3 How will the pH of the solution change when solid NaF is dissolved
in the solution? (Write down only DECREASES, INCREASES or
STAYS THE SAME.) (2)
7.14 Give an explanation for your answer to QUESTION 7.1.3. (3)
7.2 0,50 dm? of a HCE solution of concentration x mol.dm® is added to 0,80 dm?
of a 0,25 mol.dm® solution of NaOH. At the completion of the reaction it is
found that 0,12 mol of hydroxide ions (OH) is present in the solution.
7.2.1 Calculate x, the concentration of the HC£ solution. (8)
7.2.2 Calculate the concentration of the hydroxide ions (OH) at the
completion of the reaction. (3)
7.2.3 Calculate the pH of the solution at the completion of the reaction. (4)
[23]
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Physical Science/HG/P2 14 DBE/2012
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SCE
QUESTION 8 (START ON A NEW PAGE.)
8.1 An iron nail and a silver ring which have been thoroughly cleaned, are both
placed in a beaker containing a 1 mol.dm® copper sulphate solution. The
beaker is allowed to stand undisturbed overnight. The next morning it is
observed that a reddish brown precipitate is formed on the iron nail, while the
silver ring shows no:change.
8.1.1 Write down the FORMULA of the reddish brown precipitate that
formed on the iron nail.
8.1.2 Refer to the relative strength of reducing agents to explain why a
reddish brown precipitate formed on the iron nail.
8.1.3 Refer to the relative strength of reducing agents to explain why the
silver ring shows no change.
8.2 The cell notation of a standard galvanic (voltaic) cell containing an unknown
metal electrode X is shown below:
8.2.1
8.2.2
8.2.3
8.2.4
8.2.5
8.2.6
8.2.7
Copyright reserved
X(s) | X** (1 mol-dm’*) |] Pb?* (1 mol-dm’) | Pb(s)
Name the component of the cell represented by the double vertical
lines (||) in the above cell notation.
What is the function of the component mentioned in
QUESTION 8.2.1?
Identify the oxidising agent in the above cell.
The initial reading on a voltmeter connected across the electrodes of
the above cell is 1,53 V. Identify metal X by calculating the standard
reduction potential of the unknown metal X.
Write down the balanced equation for the net (overall) reaction taking
place in this cell. Omit the spectator ions.
How will the initial voltmeter reading be affected if the concentration
of the electrolyte in the X(s)|X**(aq) half-cell is increased? Write
down only INCREASES, DECREASES or REMAINS THE SAME.
Write down the value of the reading on the voltmeter when the cell
reaction has run to completion.
HOUTA ON AA atninia
(1)
(3)
(3)
(1)
(2)
(2)
(5)
(3)
(2)
(2)
[24]
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Physical Science/HG/P2 15 DBE/2012
SCE
QUESTION 9 (START ON A NEW PAGE.)
9.1 Organic compounds are widely used in homes and industries. Consider the
following list of organic compounds represented by the letters A to F:
A. C2H2 B. C4Hio C. CHC;
D. C2Ck, E. CH3COOH F. HCOOH
From the list choose ONE compound that: (Write down the letter of the correct
answer only.)
9.1.1 Is used in dry cleaning (1)
_ Can be used as an anaesthetic (1)
9.1.3 Is used as a household acid (1)
9.1.4 Is used in gas lighters (1)
9.2 Write down a balanced equation for the combustion reaction of compound B
in an excess oxygen. (Structural formulae are NOT required). (3)
9.3 Consider the following organic compound:
H O H
1 oll |
H-—C—C—O-C—H
| I
H H
9.3.1 Write down the IUPAC name of this compound. (2)
9.3.2 Write down the structural formula and IUPAC name of on isomer of
this compound. (3)
_ Write down the names of the two organic compounds that are
used to prepare this compound. (4)
[16]
GRAND TOTAL: 200
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1
SCE
Physical Science/HG/P2 DBE/2012
DATA FOR PHYSICAL SCIENCE
PAPER 2 (CHEMISTRY)
GEGEWENS VIR NATUUR- EN SKEIKUNDE
VRAESTEL 2 (CHEMIE)
TABLE 1: PHYSICAL CONSTANTS
TABEL 1: FISIESE KONSTANTES
Avogadro's constant 23 “4
Avogadro-konstante Woe 6,02 x 10™ mol
Molar gas constant A «|
Molére gaskonstante R 8,31 J.K’.mol
Standard pressure 0 5
Standaarddruk P 1,013 x 10° Pa
Molar gas volume at STP 3 4
Molére gasvolume by STD Vm 22,4 dm”.mol
Standard temperature
Standaardtemperatuur r° 273K
TABLE 2: FORMULAE
TABEL 2: FORMULES
P17 _ P22 eV _ Ma
T; T, cChVy Mp
pV =nRT K, =[H*][OH"]=10" at/by 298 K
ne HH = —-log{H*]
M pit = —log)
n E%eut E’ oxidising agent /E educing agent
_
V
Eset = EF’ oksideermiddel A EF eduseermiddel
= — oO 0 Oo
27 MV E' cell = E' cathode IE anode
E*se1 = E’ratode A EE’ anode
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Physical Science/HG/P2
SCE
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TABLE 4A: STANDARD REDUCTION POTENTIALS/
TABEL 4A: STANDAARD- REDUKSIEPOTENSIALE
Half-reactions/Halfreaksies E°/volt
Fo+ 2e + 2F +2,87
H202 + 2H*+ 2e = 2HO +1,77
MnO, + 8H*+ 5e = Mn + 4H,0 +1,51
Au**+ 3e = Au +1,42
Cht+ 2e = 2C6 +1,36
CroO7* + 14H*+ Ge = = 2Cr** + 7H2O +1,33
QO. + 4H*+ 4e = 2H,O +1,23
MnO, + 4H*+ 2e = Mn** + 2H,O +1,21
Pt*+ 2e = Pt +1,20
Brot 2e + 2Br +1,09
NOs + 4H*+ 3e = NO + 2H,0 +0,96
©) Ag'te = Ag +0,80
2 + NOs + 2H*+ e& = NOz + HO +0,80
5 Hg?*+ 2e = Hg +0,79
a Fe*+ e@ = Fe* +0,77
8B O2 + 2H*+ 2e = HsO2 +0,68
Fy b+ 2e = 2F +0,54
2 SOQ2 + 4H*+ 4e@ = S + 2H20 +0,45
3 2H20 + Oo+ 4e& = 40H +0,40
$s Cu*+ 2e = Cu +0,34
2 SO,7 + 4H*+ 2e = SO, + 2H,0 +0,17
5 Cu*+e + Cu +0,16
— Sn**+ 2e = Sn* +0,15
2 S + 2H'+ 2e + HS +0,14
8 2H*+ 2e° = He 0,00
g Fe*+ 3e€ = Fe -0,04
FS Pb?*+ 2e° = Pb -0,13
3 Sn?*+ 2e = Sn -0,14
a Ni*+ 2e = Ni -0,25
< Co**+ 2e + Co -0,28
3 Cd**+ 2e = Cd -0,40
x Fe**+ 2e «= Fe -0,44
ol Crt+ 3e = Cr -0,74
é Zn**+ 2e = Zn -0,76
g 2H.O+ 2e + Ho + 20H -0,83
Ey Mn2*+ 2e = Mn -1,18
[= A+ 3e = At -1,66
Mg?*+ 2e = Mg -2,37
Na*+ & = Na -2,71
Ca**+ 2e = Ca -2,87
Srt+ 2e = Sr -2,89
Ba**+ 2e = Ba -2,90
Cs*t & = Cs -2,92
Weg . i -2,93
Lite = Li -3,05
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Increasing reducing ability/ Toenemende reduserende vermoé
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TABLE 4B: STANDARD REDUCTION POTENTIALS/
TABEL 4B: STANDAARD- REDUKSIEPOTENSIALE
Half-reactions/Halfreaksies E°/volt
feo 8 -3,05
Kee —- Kk -2,93
Cs*+ & = Cs -2,92
Ba**+ 2e = Ba -2,90
Srt+ 2e = Sr -2,89
Ca**+ 2e = Ca -2,87
Na‘+ & = Na -2,71
Mg*+ 2e = Mg -2,37
AGt+ 3e = AL -1,66
Mn**+ 2e = Mn -1,18
2H20+ 2e = Hy + 20H -0,83
Zn*+ 2e = Zn -0,76
g Cr+ 3e& = Cr -0,74
iS Fe**+ 2e = Fe -0,44
g Ca*+ 2e = Cd -0,40
a Co**+ 2e = Co -0,28
zg Ni*+ 26 + Ni -0,25
2 Sn7*+ 2e = Sn -0,14
3 Pb*+ 2e + Pb -0,13
g Fe*+ 3e = Fe -0,04
: 2H*+ 2e = He 0,00
3 S + 2H*+ 2e = HS +0,14
5 Sn**+ 2e = Sn* +0,15
5 Clee. | Cy +0,16
5 SO,7 + 4H*+ 2e + SO2 + 2H,0 +0,17
ec Cu*+ 2e = Cu +0,34
3 2H20 + Q2+ 4e = 40H +0,40
= SO, + 4H*+ 4e = S + 2H,0 +0,45
| b+ 2e = 2F +0,54
3 O2 + 2H*+ 2e& == HsOo +0,68
‘a Fe"+ e@ = Fe +0,77
i] Hg?*+ 2e = Hg +0,79
3 NO; + 2H*+ @& = NO»: + H2O +0,80
3 Ag+ & = Ag +0,80
‘a NO; + 4H*+ 3e& = NO + 2H20 +0,96
Fy Brot 2e° + 2Br +1,09
gl ¥ Pt™+ 2e + Pt +1,20
= MnO, + 4H*+ 2e& = Mn** + 2H2O +1,21
O2 + 4H*+ 4e = 2H,O +1,23
Cr207* + 14H*+ Ge = = 2Cr** + 7H2O +1,33
Cht+t 2e - 2Cf +1,36
Au**+ 3e = Au +1,42
MnO, + 8H*+ 5e& = Mn** + 4H,O +1,51
H202 + 2H*+ 2e& = 2H,O +1,77
Fo+ 2e «= 2F +2,87
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Increasing reducing ability/ Toenemende reduserende vermoé
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ANSWER SHEET
CENTRE NUMBER:
EXAMINATION NUMBER:
1.1 A B Cc D
1.2 A B Cc D
1.3 A B Cc D
1.4 A B Cc D
1.5 A B Cc D
1.6 A B Cc D
1.7 A B Cc D
1.8 A B Cc D
For the use of the marker
1.9 A B Cc D Vir die gebruik van die nasiener
Marks obtained
1.10 A B Cc D Punte behaal
1.11 A B (e D
Marker's
initials
1.12 A B Cc D Nasiener
' se paraaf
1.13 A B Cc D Marker's
number
INasiener
1.14 A B Cc D se nommer
1.15 A B Cc D (15 x 4) [60]
conriattesened AI A AL
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