# 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. - Page: https://www.hlayiso.com/library/physical-science-p2-hg-english-june-2012-qp/3dab9d57-5de4-490a-97e3-0f084f65f7e2 - Updated: 2026-09-27 - Subject: Physical Sciences - Grade: Grade 12 - Language: English - Document type: Question paper - Year: 2012 - Exam period: NSC June - Paper: 2 - Curriculum: CAPS - Pages: 25 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 NSC June 2012 QP (Eng)](https://www.hlayiso.com/library/physical-science-p2-hg-english-june-2012-qp/3dab9d57-5de4-490a-97e3-0f084f65f7e2) ## About this document Physical Sciences · Grade 12 · NSC June · 2012 · English. Question paper, 25 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 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. X05 ? Copyright reserved (ARIA AO OO TA Please turn over ### Page 2 Downloaded from hlayiso.com 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 ### Page 3 Downloaded from hlayiso.com 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 ### Page 4 Downloaded from hlayiso.com 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) i diliamlial CIMT AOA ATA Mease turn over ### Page 5 Downloaded from hlayiso.com 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) Conwinrosomes NLU LAL Pease tum over ### Page 6 Downloaded from hlayiso.com 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 Mg (4) co resoves NLL A ia ### Page 7 Downloaded from hlayiso.com 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 ### Page 8 Downloaded from hlayiso.com 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 ### Page 9 Downloaded from hlayiso.com 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] cov resomes NN aaa ### Page 10 Downloaded from hlayiso.com 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] ### Page 11 Downloaded from hlayiso.com 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) ### Page 12 Downloaded from hlayiso.com 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] ### Page 13 Downloaded from hlayiso.com 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] Conwintosomed NNN A Pesetum over ### Page 14 Physical Science/HG/P2 14 DBE/2012 Downloaded from hlayiso.com 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] ### Page 15 Downloaded from hlayiso.com 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 Copyrignt reserved FUE AG A EU ### Page 16 Downloaded from hlayiso.com ### Page 17 Downloaded from hlayiso.com 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 Cop esoned NAA 0 A Pease tum vr ### Page 18 Downloaded from hlayiso.com ### Page 19 SNaLNVD 49n0 win} e822 IOUT OG VU AT ABA penseses 3yburdoo sez cee J7 | ON |PIWW |W | Sa | Jo | ¥a jw |wy | ng | dN Nn | ed | UL cor cob LOL ooL 66 86 246 96 s6 v6 £6 6 16 06 SLL eLb 691 LOL SOL eoL 6SL ZSb Sb OSL vvL byL ovL E n7 |} GA |WL | 45 | OH | Aq | GL | PS | Ny |ws |wWd_ | PN | dd | 99 ae = fo) bZ 02 69 89 49 99 s9 v9 £9 (4) 9 09 6S 8s ov ey? 44q~ ° es | se | 28 ° ~])»)] 60z=] 20z=| poz] b0z | Zeb | Se | zeL | oer | 98+ | pL | bab | GZbal eet | Zero] etbo 2 uy | iW] Od?| !g°| dd®) 31°] 6H | NV | Jd 41}SO | 9y | M | BL | JH?) &T | PG®) SOX 2 98 S38 vs 3 4°] Ls 08 62 82 ZL 92 Sl bl eZ eZ Zs 9S ss & leh | d@byo] 8Zbyl ZZbal Gbba| Sbbal Zbba) BOba| 9Obw| EOln| bOlw) | 965) 26 | 16a) 68/ sea| 980 <= 8X I7| 8L>| qg®| ug’) up) po) By®) Pd®} yyy) ny} 91°) OW?) 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M® ro} 9¢ s¢ ve ee ce Le oe 62 82 (KA 92 S@ ve Lx4 (44 XA 02 6L a) A | ER | ee ee (psepeuag) esseumoojze amenejey Yeu) to xe} AV | a9 Ss d IS”| 3Vv (Ajayewxosdde) sgew o1woje aanejoy BIN’) EN S 8L db oL SL vb eb 1 ZL bb 02 6ba Shes Vho Shr bho s‘eo. 64 lo = 4 : ! ! ooquit : yoy mpeBou0nya/3 : bs c ®N 4°] 07} Nel 97 ge voauike —>ng°|<—\ “fnneBouoyoay | 9G"! 11° S o | 6| 8} z2{| 9] ¢ g y| ie fe) v by a) 2H} IA IA A OA I reyeburooyy | H> : sequuinu s1wWoyy : 0 7aLNATS!IAAM I 2+0¢/48qd FOS FLNAWATA NVA T3aVL AMFIdGOlY3Ad Ald -€ T7aVL SLNAIWSTA JO A18V1L DIGOMAd SHL *€ dav ZA/DH/EIUAIDS [BIISAY ### Page 20 Downloaded from hlayiso.com ### Page 21 Physical Science/HG/P2 SCE Downloaded from hlayiso.com 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 Copyright reserved Ill Illi ill IMUM Hill IN| Ill | GAUTENG tH DBE/2012 Increasing reducing ability/ Toenemende reduserende vermoé ### Page 22 Downloaded from hlayiso.com ### Page 23 Downloaded fro Physical Science/HG/P2 SCE m hlayiso.com 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 Copyright reserved GAUTENG DBE/2012 Increasing reducing ability/ Toenemende reduserende vermoé ### Page 24 Downloaded from hlayiso.com ### Page 25 Downloaded from hlayiso.com Physical Science/HG/P2 DBE/2012 SCE 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 ## Related documents - [Physical Science P1 (SG) (English) June 2012 QP](https://www.hlayiso.com/library/physical-science-p1-sg-english-june-2012-qp/0c084a64-a915-451d-b115-ecf0fdc0bc4b) — Physical Sciences · QP · 2012 · Eng - [Physical Science P1 (SG) (English) 2013 QP](https://www.hlayiso.com/library/physical-science-p1-sg-english-2013-qp/ed268f35-b433-4e08-9d31-c9740a72299f) — Physical Sciences · QP · 2013 · Eng - [Physical Sciences P2 May-June 2025 Eng](https://www.hlayiso.com/library/physical-sciences-p2-may-june-2025-eng/efdef1a0-c94f-4d02-954a-5262f99ca4af) — Physical Sciences · QP · 2025 · Eng - [PHYS SCIENCES P2 GR12 QP SEPT2023 English](https://www.hlayiso.com/library/phys-sciences-p2-gr12-qp-sept2023-english/f017d6ca-bfcd-44e3-bc0c-14bcf23396c8) — Physical Sciences · QP · 2023 · Eng - [ldoe physc p2 sept 2014 p2 english](https://www.hlayiso.com/library/ldoe-physc-p2-sept-2014-p2-english/152643de-d636-4e6d-9fe5-b0a286e6a46c) — Physical Sciences · QP · 2014 · Eng - [Physical Science Bill P2 (HG) 2013 Memo](https://www.hlayiso.com/library/physical-science-bill-p2-hg-2013-memo/766c928b-576d-4b54-95d2-d51c99bd6ce5) — Physical Sciences · Memo · 2013 ## More from Grade 12 Physical Sciences - [Pysical Sciences P2 Memo AfrEng watermark](https://www.hlayiso.com/library/pysical-sciences-p2-memo-afreng-watermark/cb0c7842-3512-4579-a012-a91b31f09008) — Memo · 2025 - [PHY SC P1 MEMO GR 12 SEPT 2025 E+A watermark](https://www.hlayiso.com/library/phy-sc-p1-memo-gr-12-sept-2025-e-a-watermark/ee8fc295-8eb6-4163-acb0-c6d2b3dec26f) — Memo · 2025 - [Physical Sciences Physics Grade 12 NSC MEMO P1 May June 2025 Limpopo](https://www.hlayiso.com/library/physical-sciences-physics-grade-12-nsc-memo-p1-may-june-2025-limpopo/82f7a5dc-e27f-400b-84ae-bcf3217097d6) — Memo · 2025 - [Physical Sciences Physics Grade 12 NSC MEMO P2 May June 2025 Limpopo](https://www.hlayiso.com/library/physical-sciences-physics-grade-12-nsc-memo-p2-may-june-2025-limpopo/f2cd1409-6db0-4f23-b078-ce944b93c2b5) — Memo · 2025 - [Physics Grade 12 NSC P1 MEMO September 2025 Limpopo](https://www.hlayiso.com/library/physics-grade-12-nsc-p1-memo-september-2025-limpopo/ee326b2b-8480-42f2-8ce0-7bcf6229bde6) — Memo · 2025 - [Physical Sciences Physics Grade 12 NSC MEMO March 2025 Mpumalanga](https://www.hlayiso.com/library/physical-sciences-physics-grade-12-nsc-memo-march-2025-mpumalanga/88039ede-226f-4c60-918e-92c8ef3e11cc) — Memo · 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. 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