# Physical Sciences Grade 12 P2 Free StateNovember 2014 Memo

> Grade 12 Physical Sciences Paper 2 memorandum from the Free StateNovember 2014, 13 pages. Read online or download the free PDF.

- Page: https://www.hlayiso.com/library/fs-physical-sciences-p2-september-2014-memo/6a63d789-19ff-4ec8-844d-037132cdf1d9
- Updated: 2026-09-27
- Subject: Physical Sciences
- Grade: Grade 12
- Document type: Memorandum
- Year: 2014
- Exam period: Free StateNovember
- Paper: 2
- Curriculum: CAPS
- Pages: 13

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Physical Sciences · Grade 12 · Free StateNovember · 2014. Memorandum, 13 pages. Read online or download the PDF.

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### Page 1

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         PREPARATORY EXAMINATION
         VOORBEREIDENDE EKSAMEN

                        GRADE/GRAAD 12

                        SEPTEMBER 2014

PHYSICAL SCIENCES/FISIESE WETENSKAPPE
           PAPER/VRAESTEL 2
          (CHEMISTRY/CHEMIE)

                            MARKS/PUNTE: 150

                       TIME/TYD: 3 HOURS/UUR

                     This memorandum consists of 13 pages.
                   Hierdie memorandum bestaan uit 13 bladsye.

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Memo: PhySci P2/Fis Wet V2 Gr 12            2              FSDoE/VSDvO September 2014

QUESTION 1/VRAAG 1

1.1    B                                                                                (2)
1.2    C                                                                                (2)
1.3    C                                                                                (2)
1.4    B                                                                                (2)
1.5    D                                                                                (2)
1.6    C                                                                                (2)
1.7    A                                                                                (2)
1.8    A                                                                                (2)
1.9    C                                                                                (2)
1.10   B                                                                                (2)

QUESTION 2/VRAAG 2

2.1
2.1.1 E                                                                                  (1)
2.1.2 C                                                                                  (1)
2.1.3 B                                                                                  (1)
2.1.4 G                                                                                  (1)
2.1.5 B & H                                                                              (1)

2.2
       IF/INDIEN:
       Correct IUPAC name, but one or more of the following errors: omitting hyphens
       and/or commas; including extra spaces and/or hyphens
       Korrekte IUPAC-naam, maar een of meer van die volgende foute: weglating
       van koppeltekens en/of kommas; insluiting van ekstra spasies en/of
       koppeltekens                                              Max./Maks. 1
                                                                               2

2.2.1 3-methylpentanal
      3-metielpentanaal                                                                   (2)

2.2.2 4-ethylhex-2-yne 
      4-etielheks-2-yn

       OR/OF
       4-ethyl-2-hexyne
       4-etiel-2-heksyn                                                                   (2)

2.2.3 2,4-dimethylhexane  / 2,4-dimetielheksaan                                         (2)

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Memo: PhySci P2/Fis Wet V2 Gr 12                             3              FSDoE/VSDvO September 2014

2.3                            H
2.31
                       H       C       H                     Marking criteria/Nasienriglyne:
                                                              Functional group
                 H     H               H                       Funksionele groep
                           
                                                              Whole molecule correct
        H        C     C       C       C       H 
                                                               Hele molekuul korrek
                 Br     Br H           H

            IF/INDIEN:
                Condensed or semi-structural formula: 1
                                                        2
                 Gekondenseerde of semistruktuurformule: 1
                                                           2
                Molecular formula/Molekulêre formule: 0
                                                         2
                                                                                                           (2)
                                          
2.3.2            H     H       H       O       H
                                                                 Marking criteria/Nasienriglyne:
        H        C     C       C       C       C     H            Functional group
                                                                  Funksionele groep
                 H             H               H                  Whole molecule correct
                 H     C       H                                   Hele molekuul korrek

                       H
            IF/INDIEN:
                    Condensed or semi-structural formula/ 1
                                                            2
                     Gekondenseerde of semistruktuurformule: 1
                                                               2
                    Molecular formula/Molekulêre formule: 0
                                                             2
                                                                                                           (2)

2.4
2.4.1 Esterification / Verestering / Esterifikasie                                                        (1)

                                               
2.4.2            H      H                  O       H     H              Marking criteria/Nasienriglyne:
                                                                         Functional group
        H        C      C          O       C       C     C       H       Funksionele groep
                                                                         Whole molecule correct
                 H      H                          H     H                Hele molekuul korrek
            IF/INDIEN:
                Condensed or semi-structural formula/ 1
                                                        2
                 Gekondenseerde of semistruktuurformule: 1
                                                           2
                Molecular formula/Molekulêre formule: 0
                                                         2
                                                                                                          (2)
                                                                                                         [18]

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Memo: PhySci P2/Fis Wet V2 Gr 12          4               FSDoE/VSDvO September 2014

QUESTION 3/VRAAG 3

3.1
3.1.1 Alkanes / Alkane                                                                  (1)

3.1.2 Chain (isomerism) / Ketting(isomerisme)                                           (1)

3.2
3.2.1 Branching / Vertakking 
        Note/Let wel:
        No marks for: number of C atoms / chain length
        Geen punte vir: aantal C-atome / kettinglengte
                                                                                         (1)

3.2.2 Structure/Stuktuur:
      From A to C/Van A na C:
      Branching decreases / molecules become less compact / surface area
      increases (over which intermolecular forces act). 
      Vertakking verminder / molekule word minder kompak / oppervlak (waaroor
      intermolekulêre kragte werk) word groter.
      Intermolecular forces/Intermolekulêre kragte:
      Stronger or more intermolecular forces / Van der Waals forces / dispersion
      forces / London forces. 
      Sterker of meer intermolekulêre kragte / Van der Waalskragte /
      dispersiekragte / Londonkragte.
      Energy/Energie:
      More energy needed to overcome intermolecular forces / Van der Waals
      forces / dispersion forces / London forces. 
      Meer energie benodig om intermolekulêre kragte / Van der Waalskragte /
      dispersiekragte / Londonkragte te oorkom.

3.2.3 B 
      Lowest boiling point / Laagste kookpunt                                           (2)

3.3
3.3.1 London forces / Dispersion forces 
      Londonkragte / Dispersiekragte                                                     (1)

3.3.2 London forces / Dispersion forces 
      Dipole-dipole forces 
       Londonkragte / Dispersiekragte
       Dipool-dipoolkragte                                                               (2)

3.4    The hydrogen bonds between molecules of E 
       are stronger than the dipole-dipole forces between molecules of D. 
       Die waterstofbindings tussen molekule van E
       is sterker as die dipool-dipoolkragte tussen molekule van D.                     (2)
                                                                                       [13]

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Memo: PhySci P2/Fis Wet V2 Gr 12                     5                  FSDoE/VSDvO September 2014

QUESTION 4/VRAAG 4

4.1
4.1.1 Addition / hydration 
      Addisie / hidrasie / hidratering                                                                   (1)

4.1.2 Substitution / halogenation / chloronation 
      Substitusie / halogenasie / halogenering / chloronering                                            (1)

4.1.3 Elimination / dehydration 
      Eliminasie / dehidrasie / dehidratering                                                            (1)

4.2
4.2.1 H2SO4 / H3PO4                                                                                     (1)

4.2.2               H       H       H

            H       C       C       C   H       Marking criteria/Nasienriglyne:
                                                  Functional group
                    H       O       H             Funksionele groep
                                                  Whole molecule correct
                            H                     Hele molekuul korrek

                    ACCEPT/AANVAAR:-OH as condensed/ as gekondenseerd
                    IF/INDIEN:
                      Condensed or semi-structural formula/ 1
                                                               2
                         Gekondenseerde of semistruktuurformule: 1
                                                                  2
                      Molecular formula/Molekulêre formule: 0
                                                               2
                                                                                                         (2)

4.3
4.3.1 Hydration / Hidrasie / Hidratering                                                                (1)

                                H                                  H       H     H
4.3.2       H           H                                                             
                                        
                C       C       C H + H H                   H      C       C     C      H
            H                   H                                  H       H     H
        Marking guidelines/Nasienriglyne:
         One mark for each correct structure./Een punt vir elke korrekte struktuur.
         Accept molecular formula for H2./Aanvaar molekulêre formule vir H2.
         Marking rule 6.3.10./Nasienreël 6.3.10.
         Any additional reactants or products:/Enige addisionele reaktanse of produkte:
            Max./Maks. 2
                                3
           If arrow in equation omitted:/Indien pyltjie in vergelyking uitgelaat is: Max./Maks. 2
                                                                                                     3
                                                                                                         (3)

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Memo: PhySci P2/Fis Wet V2 Gr 12                                 6              FSDoE/VSDvO September 2014

4.4
4.4.1 2-chloropropane  / 2-chloropropaan                                                                     (2)
4.4.2 Sodium hydroxide / Potassium hydroxide 
      Natriumhidroksied / Kaliumhidroksied                                                                     (1)
4.4.3 Dilute base / Verdunde basis 
      Mild heat / Matige hitte                                                                               (2)
                                                                                                             [15]
QUESTION 5/VRAAG 5
5.1     The concentration of hydrochloric acid decreases. 
        Die konsentrasie van soutsuur verminder.                                                               (1)
5.2                                                          Marking criteria/Nasienriglyne
                                                             Correct shape with decreasing gradient as
                                                                                                        

        Mass (g)
                                                             shown./Korrekte vorm met afnemende
                                                             gradiënt soos aangetoon.
                                                             Graph ends parallel to x axis and does not
                                                             touch the x axis./Grafiek eindig parallel  
                                                             aan x-as en raak nie die x-as nie.

                                            Time (s)
                                                                                                               (2)

5.3     Increases / Verhoog 
         At a higher temperature, more molecules have enough/sufficient kinetic
            energy / more molecules have kinetic energy greater than the activation
            energy. 
            By 'n hoër temperatuur het meer molekule genoeg kinetiese energie /
            meer molekule het kinetiese energie hoër as die aktiveringsenergie.
         More effective collisions per unit time/second. 
            Meer effektiewe botsings per eenheidstyd/sekonde.                       (3)

5.4

           Potential energy /
                                                              Marking criteria/Nasienriglyne:
                                                               Correct shape/Korrekte vorm 
                                                               (a) & (b) as shown/soos aangetoon 
                                                               (c) as shown/soos aangetoon 
                                                       (c)     (d) as shown/ soos aangetoon 

           Potensiële energie (J)     (a)
                                                       (d)           (b)

                                    Course of reaction / Reaksieverloop

       No labels on axis/Geen benoemings op asse:                                    Max./Maks. 3
                                                                               4
       IF shape for endothermic reaction/INDIEN vorm vir endotermiese reaksie: 0
                                                                                                        4
                                                                                                               (4)

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Memo: PhySci P2/Fis Wet V2 Gr 12         7             FSDoE/VSDvO September 2014

5.5
          Marking criteria/Nasienriglyne:
           Substitution of volume and concentration of acid. 
            Substitusie van volume en konsentrasie van suur.
           Using ratio/Gebruik verhouding: (Mg) = ½n(HCℓ) 
                                     m                           m
           Substitution of 24 in n  /Substitusie van 24 in n    
                                     M                           M
           Initial mass/mole Mg – mass/mole Mg reacted 
            Aanvanklike massa/mol Mg – massa/mol Mg gereageer
           Final answer/Finale antwoord: 9,6 g 

                     n
                c=
                     V
                         n
                2=               
                    100  10  3
                 n = 0,2 mol

                n(Mg reacted/gereageer) = ½n(HCℓ) = 0,1 mol 

                         OPTION 1/OPSIE 1               OPTION 2/OPSIE 2

        m(Mg reacted/gereageer):        n(Mg initially/aanvanklik):
                m                           m
        n(Mg) =                         n =
                M                           M
                 m                          12
         0,1 =                          =      
                24                          24
         m = 2,4 g                       = 0,5 mol

        m(Mg) in excess/in oormaat:     n(Mg in excess/in oormaat):
        m = 12 – 2,4                   n = 0,5 – 0,1 
          = 9,6 g                        = 0,4 mol

                                        m(Mg in excess/in oormaat):
                                            m
                                        n=
                                            M
                                              m
                                        0,4 =
                                              24
                                         m = 9,6 g 
                                                                                     (5)
                                                                                    [15]

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Memo: PhySci P2/Fis Wet V2 Gr 12                8             FSDoE/VSDvO September 2014

QUESTION 6

6.1    Homogeneous / Homogeen 
       Reactants and products are in the same phase. 
       Reaktanse en produkte is in dieselfde fase.                                           (2)

6.2    CALCULATIONS USING NUMBER OF MOLES:
       BEREKENINGE WAT GETAL MOL GEBRUIK:
       Mark allocation/Puntetoekenning:
         n(CCℓ4) at equilibrium = 0,9 mol / n(CCℓ4) by ewewig = 0,9 mol. 
         Ratio/Verhouding: CS2 : Cℓ2 : S2Cℓ2 : CCℓ4 = 0,9 : 2,7 : 0,9 : 0,9 
         Equilibrium n(CS2) & n(Cℓ2): initial – change 
          Ewewig n(CS2) & n(Cℓ2): aanvanklik – verandering
         Equilibrium: n(S2Cℓ2) = initial + change 
          Ewewig: n(S2Cℓ2) = aanvanklik + verandering
         Divide ALL equilibrium number of moles by 5 dm3. 
          Deel ALLE ewewigs getal mol deur deur 5 dm3.
         Correct Kc expression (formulae in square brackets). 
          Korrekte Kc-uitdrukking (formules in vierkanthakies)
         Substitution of equilibrium concentrations into Kc expression. 
          Vervanging van ewewigskonsentrasies in Kc-uitdrukking.
         Substitution of Kc value. / Vervanging van Kc-waarde. 
         Final answer/Finale antwoord: 4,92 

                                         CS2         Cℓ2    S2Cℓ2          CCℓ4
        Initial mol
                                          1,2        4       0               0
        Aanvanklike mol
        Change in mol                                                                     Ratio/
                                          0,9        2,7     0,9            0,9
        Verandering in mol                                                               Verhouding
        Mole at equilibrium                                          138,6
        Mol by ewewig                     0,3       1,3    0,9           = 0,9 
                                                                      154
        Equilibrium concentration                                                       Divide by
        Ewewigskonsentrasie              0,15       0,65    0,45           0,45         5/Gedeel
        (mol·dm-3)                                                                      deur 5
              [S2C 2 ][CC 4 ]     (0,45 )(0,45 )
       Kc =                   3
                                =                  = 4,92 
               [CS 2 ][C 2 ]      (0,15 )(0,65 )3

        No Kc expression, correct substitution/
        Geen Kc-uitdrukking, korrekte substitusie:                  Max./Maks. 7
                                                                                   8
        Wrong Kc expression/Verkeerde Kc-uitdrukking:               Max./Maks. 5
                                                                                   8
                                                                                             (8)

6.3
6.3.1 Decreases / Verlaag                                                                   (1)

6.3.2 Remains the same / Bly dieselfde                                                       (1)

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Memo: PhySci P2/Fis Wet V2 Gr 12           9              FSDoE/VSDvO September 2014

6.4    Reactants were removed./Reaktanse is verwyder. 

       OR/OF
       CS2 and/or Cℓ2 were removed./ CS2 en/of Cℓ2 is verwyder.                          (1)

6.5    Incease / Verhoog                                                                (1)

6.6
          With an increase in temperature, the rates of both the forward and
           reverse reactions increase. 
           Met 'n verhoging in temperatuur verhoog die tempos van beide die voor-
           en terugwaartse reaksies.
          The rate of the reverse endothermic reaction increases more than that of
           the forward reaction.
           Die tempo van die terugwaartse endotermiese reaksie verhoog meer as
           dié van die voorwaarste reaksie.
           OR/OF
           The rate of the forward exothermic reaction increases less than that of
           reverse reaction. 
           Die tempo van die voorwaarste eksotermiese reaksie verhoog minder as
           dié van die terugwaartse reaksie.
          The rate of the forward reaction then increases gradually due to the
           increase in concentration of reactants. / Die tempo van die voorwaartse
           reaksie verhoog dan stelselmatig as gevolg van die verhoging in
           konsentrasie van reaktanse. 
          The rate of the reverse reaction then decreases gradually due to the
           decrease in concentration of products. / Die tempo van die terugwaartse
           reaksie verlaag dan stelselmatig as gevolg van die verlaging in
           konsentrasie van produkte. 
          Equilibrium is reached after 22 minutes / the rate of forward and reverse
           reactions are equal after 22 minutes. 
           Ewewig word na 22 minute bereik / die tempo van voor- en terugwaartse
           reaksies is gelyk na 22 minute.                                           (5)
                                                                                   [19]

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Memo: PhySci P2/Fis Wet V2 Gr 12            10              FSDoE/VSDvO September 2014

QUESTION 7

7.1
7.1.1 Diprotic / Diproties                                                               (1)

7.1.2 HSO 4                                                                             (1)

7.1.3 Sulphate ion / Sulfaatioon                                                         (1)
7.2
7.2.1 pH = -log[H3O+] 
      0 = -log[H3O+]
       [H3O+] = 100 = 1 mol·dm-3 
       [HCℓ] = 1 mol·dm-3

           n
       c=     
           V
               n
       1=              
           50  10  3
        n = 5 x 10-2 mol          (0,05 mol)                                            (5)

7.2.2 CO32 + H2O ⇌ HCO 3 + OH-               Bal. 
          Marking criteria/Nasienriglyne
           Reactants           Products         Balancing 
             Reaktanse          Produkte         Balansering 
           Ignore/Ignoreer → and phases / en fases
           Marking rule 3.10/Nasienreël 3.10
                                                                                          (3)

7.2.3 Burette / Buret                                                                    (1)

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Memo: PhySci P2/Fis Wet V2 Gr 12          11                 FSDoE/VSDvO September 2014

7.2.4 POSITIVE MARKING FROM QUESTION 7.2.1.
      POSITIEWE NASIEN VAN VRAAG 7.2.1.
        Marking criteria/Nasienriglyne:
         Substitute cNaOH and VNaOH / Vervang cNaOH en VNaOH 
         n(HCℓ) = n(NaOH) 
         Answer from/Antwoord van Q7.2.1 – n(HCℓ) 
         n(Na2CO3) = ½n(HCℓ) 
                                                     m
            Substitute 106 and n(Na2CO3) into n      .
                                                     M
                                                   m
             Substitueer 106 en n(Na2CO3) in n 
                                                  M
            Final answer / Finale antwoord: 2,01 g

       n(NaOH) = cbVb = (0,4)(30 x 10-3) = 0,012 mol
       na 1
          
       nb 1
        n(HCℓ in excess/in oormaat) = n(NaOH) = 0,012 mol 

       n(HCℓ reacted with/gereageer met Na2CO3):
       n(HCℓ) = n(initial) – n(reacted with NaOH)
              = 0,05 – 0,012 
              = 0,038 mol

       n(Na2CO3 reacted):
       na 2       1    1
            nb  na = (0,038) = 0,019 mol 
       nb 1       2    2
          m
       n
          M
                  m
        0,019 =      
                 106
        m = 2,01 g                                                                      (6)
                                                                                         [18]

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Memo: PhySci P2/Fis Wet V2 Gr 12                12                FSDoE/VSDvO September 2014

QUESTION 8/VRAAG 8

8.1     X                                                                                      (1)

8.2
         Eocell = Eocathode – Eoanode 
         1,53  = - 0,13 - Eoanode 
         Eoanode = 1,66 V 
         X = Aℓ 
         Notes/Aantekeninge
          Accept any other correct formula from the data sheet.
            Aanvaar enige ander korrekte formule vanaf gegewensblad.
          Any other formula using unconventional abbreviations, e.g. E°cell =
              E°OA - E°RA followed by correct substitutions:    Max. 4
                                                                         5
              Enige ander formule wat onkonvensionele afkortings gebruik bv.
              E°sel = E°OM - E°RM gevolg deur korrekte vervangings: Maks. 4
                                                                               5
                                                                                                (5)

8.3
8.3.1 Higher than / Hoër as 
      Ag+ is a stronger oxidising agent than Pb2+. 
      Ag+ is 'n sterker oksideermiddel as Pb2+.                                                 (2)

8.3.2                                           
        Aℓ(s) | Aℓ3+ (1 mol·dm-3) || Ag+ (1 mol·dm-3) | Ag(s)

        OR/OF
        Aℓ(s) | Aℓ3+ (aq) || Ag+ (aq) | Ag(s)
                                                               ACCEPT/AANVAAR:
        OR/OF                                                  X | X3+ || Ag+ | Ag
        Aℓ | Aℓ3+ || Ag+ | Ag                                                                  (3)
                                                                                              [12]

QUESTION 9/VRAAG 9

9.1     Electrolytic (cell) / Elektrolitiese (sel)                                             (1)

9.2
9.2.1 P                                                                                        (1)

9.2.2 2H2O + 2e-  H2 + 2OH- 
        Marking criteria/Nasienriglyne
        2H2O + 2e- ⇌ H2 + 2OH- ( 1 )              2H2O + 2e- ← H2 + 2OH- ( 2 )
                                    2                                       2
                              - 0                                         0
                -
        H2 + 2OH ⇌ 2H2O + 2e                      H2 + 2OH  2H2O + 2e (
                                                          -            -
                                                                              )
                                  2                                         2
                                                                                                (2)

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Memo: PhySci P2/Fis Wet V2 Gr 12             13                FSDoE/VSDvO September 2014

9.2.3 Q to/na P                                                                      (1)
9.2.4 Water                                                                          (1)

9.3      2H2O + 2Cℓ-  → H2 + 2OH + Cℓ2          Bal. 
         OR/OF
         2H2O + 2NaCℓ  → H2 + 2NaOH + Cℓ2                 Bal. 
          Marking criteria/Nasienriglyne
           Reactants           Products         Balancing 
             Reaktanse          Produkte         Balansering 
           Ignore/Ignoreer ⇌ and phases / en fases
           Marking rule 3.10/Nasienreël 3.10
                                                                                      (3)
                                                                                      [9]
QUESTION 10/VRAAG 10
10.1     Percentage of fertiliser (N, P and K) present in the fertiliser. 
         Die persentasie kunsmis (N, P en K) teenwoordig in die kunsmis.              (1)
10.2
10.1.1 A                                                                             (1)
10.2.2 C                                                                             (1)
10.2.3 C                                                                             (1)
10.3
               3
10.3.1 %N =       28  = 14%                                                        (2)
               6

10.3.2
          OPTION 1/OPSIE 1                    OPTION 2/OPSIE 2
          22% of 20 kg = 4,4 kg               4
                                                 x 22 = 9,78%
          4                                   9
             x 4,4  = 1,96 kg 
          9                                   9,78% of 20 kg = 1,96 kg 
          OPTION 3/OPSIE 3
          22% of 20 kg = 4,4 kg

          44,44% of 4,4  = 1,96 kg 
                                                                                      (3)

10.4     NH3 + H2SO4  → (NH4)2SO4          Bal. 
          Marking criteria/Nasienriglyne
           Reactants           Products         Balancing 
             Reaktanse          Produkte         Balansering 
           Ignore/Ignoreer ⇌ and phases / en fases
           Marking rule 3.10/Nasienreël 3.10
                                                                                      (3)
                                                                                     [12]

                                                  GRAND TOTAL/GROOTTOTAAL: 150

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