# Physical Sciences Grade 12 P2 Western Cape Mock 2014 Memo

> Grade 12 Physical Sciences Paper 2 memorandum from the Western Cape Mock Exam 2014 (English), 6 pages. Read online or download the free PDF.

- Page: https://www.hlayiso.com/library/wkp-kwod-physc-p2-sept-2014-memo-eng/8f1b68c6-c866-490d-a9d9-9ae6d9caaadf
- Updated: 2026-09-27
- Subject: Physical Sciences
- Grade: Grade 12
- Document type: Memorandum
- Year: 2014
- Exam period: Western Cape Mock Exam
- Paper: 2
- Curriculum: CAPS
- Pages: 6

Breadcrumbs: [Home](https://www.hlayiso.com/) › [Library](https://www.hlayiso.com/library) › [Grade 12](https://www.hlayiso.com/library/grade-12) › [Physical Sciences](https://www.hlayiso.com/library/grade-12/physical-sciences) › [Physical Sciences Grade 12 P2 Western Cape Mock 2014 Memo](https://www.hlayiso.com/library/wkp-kwod-physc-p2-sept-2014-memo-eng/8f1b68c6-c866-490d-a9d9-9ae6d9caaadf)

## About this document

Physical Sciences · Grade 12 · Western Cape Mock Exam · 2014. Memorandum, 6 pages. Read online or download the PDF.

Read it free online on the page above; download the PDF from there.

## Document text

Text extracted from the PDF. Layout, diagrams and tables may not survive extraction.

### Page 1

Downloaded from hlayiso.com

         CAPE WINELANDS EDUCATION DISTRICT

                   PHYSICAL SCIENCES P2
                CHEMISTRY MEMORANDUM
                     SEPTEMBER 2014

MARKS: 150
TIME: 3 hours

### Page 2

Downloaded from hlayiso.com

QUESTION 1
 1.1 B 

                                                                            (2)
 1.2 D 

                                                                            (2)
 1.3 C 

                                                                            (2)
 1.4 A 

                                                                            (2)
 1.5 A 

                                                                            (2)
 1.6 A 

                                                                            (2)
 1.7 B 

                                                                            (2)
 1.8 D 

                                                                            (2)
 1.9 D 

                                                                            (2)
 1.10 B 

                                                                       (2)[20]

QUESTION 2
2.1.1 CnH2n+2     
                                                                        (1)
                                                               H
            H  H    H H                                        |
2.1.2       |   |   | |                                    H H-C-H H 

          H–C—C—C–C-H                   
 OR               |   |   |
            |   |   | |                                  H–C— C—C-H
            H H-C-H H H                                    |   |   |
                I                                          H H-C-H H
                H                                              I
                                                               H
            2-methylbutane       
                       2,2-dimethylpropane 
             (2)

                 H  O H
                 |  ║ |
               H–C— C—C-H
2.1.3            |     |                
 functional group 
whole molecule                 (2)
                 H    H
2.2 The stronger the intermolecular forces, the lower the vapour pressure.
            
correct variables   
correct relationship
    When IMFs are stronger, it requires more energy to break the IMFs to allow
        molecules to evaporate,
     thus fewer molecules evaporate.                       (3)
2.3 (as you go down the table), chain length/molecular size increases, 

     thus strength of Van der Waals IMFs increases 
 thus vapour pressure decreases (2)
2.4.1 1-butanol has an –OH group 
 which forms stronger Hydrogen bonding IMFs 

       than the Van der Waals IMFs in pentane                                        (2)
2.4.2 Secondary alcohols are more spheric in shape / have a smaller surface area
       for bonding / molecules cannot get as close to each other 
 as the more linear
       primary alcohols, thus IMFs are weaker, 
 thus easier to evaporate.           (2)
2.5 Ethanoic acid 
 (no positive marking → )                                               (1)
2.6 Ethanoic acid has a lower vapour pressure 
 than 1-propanol thus stronger IMFs 

    thus more energy will be required to break IMFs. 
                          (3)[18]

                                                2

### Page 3

Downloaded from hlayiso.com

QUESTION 3

3.1 A compound that has one or more double (or triple) bonds 
between C atoms. 
(2)
3.2                                   
                  H      H Br H 
H H
           H     H       H H H
                                            
             |      | l     |    l   l
            |     |       |    l   l
                                                      H – C -- C -- C – C – C – C --H
        H – C -- C ═ C – C – C – C --H
                                          + Br2           |    l     | |    l   l
            |        | |     l   l
                                                         H Br H H H H
           H         H H H H                                                                (3)
3.3 Light/heat 
                                                                            (1)

3.4.1 Addition (hydrohalogenation) 
                                                        (1)

3.4.2 Catalyst of strong acid / H2SO4 
 in (excess water)                                   (1)

3.4.3 (Dilute solution) of strong base (NaOH or KOH) 
 ( X conc base) , mild heat 
 (2)

3.4.4 but-2-ene 
               H H    H                                                    (2)
                                |  |   |  

                              H–C—C═C–C-H
                                |    | |
                                H    H H
3.5.1      ethene       
                                                                   (1)
3.5.2      addition      
                                                              (1)[14]

QUESTION 4
4.1       the change in concentration of reactants or products per unit time. 
              (1)
4.2.1 concentration 
                                                                         (1)
4.2.2 reaction rate 
 (except time)                                                           (1)
4.3.1 5. Repeat the experiment but add 2 ml of HCl and 3ml of distilled water
         6. Repeat the experiment but add 1 ml of HCl and 4ml of distilled water
         
 HCl volume is changed
         
 the conc of HCl is changed (water added to keep volume the same)
         
 the steps indicate a decrease in conc of HCl.                                      (3)
4.3.2 volume of sodium thiosulphate needs to be kept constant / temp constant /
         judgement of when cross disappears needs to be constant (same learner) /
        swirling needs to be the same / stopwatch needs to be started at same time
        in process (any one of the above is correct) 
                                        (1)
4.4 Sulphur / S. 
                                                                            (1)
4.5 Experiment 1. 
                                                                        (1)[9]
                                                  3

### Page 4

Downloaded from hlayiso.com

QUESTION 5
5.1 The rate of the forward reaction equals the rate of the reverse reaction 

             (2)
5.2     Closed 
                                                                            (1)
5.3.1 turns more orange 

                                                                  (1)
5.3.2 increases the H+ concentration 
 which favours the forward reaction
                  (2)
5.4                     Kc =       Cr2O72-      


                                [CrO42-]2 [H+]2                                             (2)
5.5 No                                                                                      (1)
5.6 Yellow                                                                                  (1)
                                                               +
5.7 The presence of hydroxide will decrease the conc of H 
 as they react to form
       water (or increase amount of H2O); according to Le Chatelier’s Principle, this
       will cause the rxn that increases the conc of H+ to be favoured 
, thus reverse rxn /
       equilibrium shifts to the left. 
                                                (3)[13]

QUESTION 6
6.1 Endothermic 
                                        
 formulas – if used               (1)
              m 35,9                                       n 0,62
6.2 nNaCl =    =     = 0,62mol _(0,6138mol )          c=     =     = 6,2mol ⋅ dm −3
              M 58,5       
                               V   0,1 


               +    −
                         
 
SUBSTITUTION 

    K c = [Na ][Cl ] = (6,2)(6,2) = 38,44 (37,66 if no rounding)                     (6)
6.3 Increase temp.
 An increase in temp will favour the endothermic rxn 
which is the
    forward rxn;
this will increase the concentration of products, thus KC.
                (4)
6.4 Less soluble. 
                                                                     (1)[12]

QUESTION 7

7.1 NaOH → Na+(aq) + OH-(aq)                 [OH-] = 0,11 
 (or: conc OH- = conc NaOH)
       Kw = 1x10-14 = [H3O+][OH-] 
 1x10-14 = [H3O+](0,11)         [H3O+] = 9,09x10-14 
 ( +→)
      pH = -log[H3O+] 
 = - log (9,09x10-14) (substitution) = 13,04 

      (Except calculation of pOH and subtracting from 14).                                  (5)
7.2 nNaOH = c x V = 0,11 x 0,0285 
= 0,0031 mol 
 (0,003135 if no rounding off)             (2)
7.3 nacid : nbase = 1:1
       nacid = 0,0031 macid in 25cm3 = nxM = 0,0031 x 60 = 0,186g 

       (+→) macid in 100 cm3 = 0,186 x 4 
= 0,744g
                                  

                         0,744
       % ethanoic acid =       × 100 = 9,9% 
 (9,9 – 10 depending on rounding off). (5)[12]
                          7,5

                                                4

### Page 5

Downloaded from hlayiso.com

QUESTION 8
8.1 Contact 
                                                                           (1)
8.2 H2S2O7 / oleum/pyrosulphuric acid / disulphuric acid / fuming sulphuric acid 
      (1)
8.3 V2O5 / Venadium pentoxide 
                                                         (1)
8.4 An acid that ionises completely. 
                                                  (1)
8.5 H2SO4 + 2 H20 → SO42- (aq) + 2 H3O+ (aq) (
LHS 
 RHS 
bal)                          (3)
8.6 H3O+ 
                                                                              (1)
8.7 ampholite                                                                           (1)
8.8 diprotic                                                                            (1)
8.9.1 oxidising agent                                                                   (1)
8.9.2 Copper was oxidised to Cu-ions 
 thus lost electrons 
                           (2)
                                                                                      [13]

QUESTION 9
9.1 Chemical energy to electrical energy. 
                                           (1)
9.2 Temperature of 25 OC / 298 K 
 Concentrations of 1 mol•dm-3. 

    NOT Pressure of 1 atm or 101,3 kPa.                                               (2)

9.3 Mg (magnesium) 
                                                                  (1)

9.4   Mg (s) →      Mg2+ + 2e                  (
LHS 
RHS 
bal)                       (3)
        
 formulas – if used
             m 0,96                                  2
9.5 nMg =      =    = 0,04mol 
       nFe = n Mg ×     = 0,027 

             M   24                                  3


      mFe = n × M = 0,027 × 56 = 1,51g 
 (1,49 if no rounding off earlier)            (5)

9.6 Eθcell   =   Eθreduction - Eθoxidation 
   (or other equivalent eqn)

             = - 0,04 
 - (- 2,37) 


             = 2,33 V. 
                   YES, 
bulb will light up                   (5)

9.7 Increase 
                                                                        (1)

9.8 Decrease 
 (neg →); an increase in [Mg2+] will inhibit the forward reaction /
    will favour the reaction that decreases [Mg2+] 
 and thus voltmeter reading will
    decrease                                                                      (2)[20]

                                                5

### Page 6

Downloaded from hlayiso.com

QUESTION 10

10.1   bauxite 
                                                                  (1)
10.2   Electrolytic 
                                                             (1)
10.3   Cathode 
                                                                  (1)
10.4   Negative 
                                                                 (1)
10.5   2 O2- 
 → O2(g) + 2e- 
                                                    (2)
10.6 DC. 
 (neg→) To produce Al (product), the reaction must not be reversed 

     (which is what would happen if power supply was AC).                      (2)[8]

QUESTION 11

11.1 Haber process 
                                                              (1)

11.2 Reaction rate would be too slow. 
                                           (1)

11.3 NO                                                                           (1)

11.4    4 NH3 + 5 O2 → 4 NO + 6 H2O (
LHS 
RHS )                                  (2)

11.5 NH4NO3 
                                                                     (1)

11.6 Can cause “blue-baby” syndrome, stomach cancer; reproductive problems,
     birth defects, endocrine, immune and nervous system malfunctions 
           (1)

            5
11.7 18,75 =  x 30 
 x= 8. 
 thus K = 1
 or N:P:K = 5:2:1                     (4)[11]
          
 x

                                          6

## Related documents

- [wkp kwod physc p1 sept 2014 eng memo](https://www.hlayiso.com/library/wkp-kwod-physc-p1-sept-2014-eng-memo/bb06a52a-4a49-454d-ae6e-5128be28cc24) — Physical Sciences · Memo · 2014 · Eng
- [PHYSICAL SCIENCES P2 JUNE 2014 GRADE 12 MEMO](https://www.hlayiso.com/library/physical-sciences-p2-june-2014-grade-12-memo/fc8cd66f-d631-437a-bc00-6dbd0d081add) — Physical Sciences · Memo · 2014
- [2014ENG gau physical science p2 eng memo](https://www.hlayiso.com/library/2014eng-gau-physical-science-p2-eng-memo/5fca6597-743c-4f85-8f26-3dea294e1dfe) — Physical Sciences · Memo · 2014 · Eng
- [mpu physical sciences p2 sept 2014 memo](https://www.hlayiso.com/library/mpu-physical-sciences-p2-sept-2014-memo/b6800da7-3221-43f2-ba55-a68d6aaa7dab) — Physical Sciences · Memo · 2014
- [fs physical sciences p2 gr 12 september 2014](https://www.hlayiso.com/library/fs-physical-sciences-p2-gr-12-september-2014/4dab514d-fa81-4d07-8f7c-8679f92197c1) — Physical Sciences · QP · 2014
- [2014AFR gau physical science p2 afr](https://www.hlayiso.com/library/2014afr-gau-physical-science-p2-afr/1d77db4a-2740-4775-93cc-930f8f26be12) — Physical Sciences · QP · 2014 · Afr

## More from Grade 12 Physical Sciences

- [PHYSICAL SCIENCE P1 QP JCT 2025 AFR D watermark](https://www.hlayiso.com/library/physical-science-p1-qp-jct-2025-afr-d-watermark/b9429ac5-acbb-4fae-989d-af9e1478a96b) — QP · 2025 · Afr
- [PHYSICAL SC P2 QP GR12 SEPTEMBER 2025 AFR1 watermark](https://www.hlayiso.com/library/physical-sc-p2-qp-gr12-september-2025-afr1-watermark/37cff2db-7c1a-4ec8-8ac5-07ec5bcf87a9) — QP · 2025
- [Physics Grade 12 NSC P2 QP September 2025 Gauteng](https://www.hlayiso.com/library/physics-grade-12-nsc-p2-qp-september-2025-gauteng/4d3cbea6-10ec-47ff-98ee-50646165ae9f) — QP · 2025
- [Physics Grade 12 NSC P1 QP September 2025 KZN](https://www.hlayiso.com/library/physics-grade-12-nsc-p1-qp-september-2025-kzn/6d225dc8-24c6-4c28-a181-df906d5a2c0e) — QP · 2025
- [Physical Sciences Physics Grade 12 PS01 QP March 2025 Limpopo](https://www.hlayiso.com/library/physical-sciences-physics-grade-12-ps01-qp-march-2025-limpopo/482ee9af-e88a-4818-9120-11ab9e045a1c) — QP · 2025
- [Physics Grade 12 NSC P1 QP September 2025 Limpopo](https://www.hlayiso.com/library/physics-grade-12-nsc-p1-qp-september-2025-limpopo/b65e9832-a6be-4312-8f5a-57425d647121) — QP · 2025

## Collection

- [Grade 12 past papers](https://www.hlayiso.com/grade-12/past-papers)

---

Hlayiso: free CAPS and IEB past papers, memos, notes and study guides for South African learners. When citing, link the page URL above, not a PDF or /api/ URL.