Physical Sciences Grade 12 Paper 2 NSC June 2013 Memo

basic education Department: Basic Education REPUBLIC OF SOUTH AFRICA SENIOR CERTIFICATE EXAMINATION SENIORSERTIFIKAAT-EKSAMEN PHYSICAL SCIENCE P2/NATUUR- EN SKEIKUNDE V2 CHEMISTRY/CHEMIE STANDARD GRADE/STANDAARDGRAAD 2013 POSSIBLE ANSWERS / MOONTLIKE ANTWOORDE \ eos BERS v MARKS/PUNTE: 150 a This memorandum consists of 7 pages. Hierdie memorandum bestaan uit 7 bladsye. Copyright reserved/Kopiereg voorbehou yg Please turn over/Blaai om asseblief

QUESTION 1/VRAAG 1 Downloaded from hlayiso.com 1.1 Dvvv 1.2 Dvvv 1.3 AVYY 1.4 BYvv¥ 1.5 AVvYv 1.6 Dvvv | 17 AVYY 1.8 AVVY 1.9 Cvvv 1.10 Cv¥vv 4.11 Dvvv 1.12 Cvvv 1.13 CY¥vv 114. Avvv 4.15 Dvvv (15x 3) [45] QUESTION 2/VRAAG 2 2.1. 2.1.1 Mass/mole/amount (of gas) Y temperature (of gas) ” Massa/mol/hoeveelheid (gas) ~ temperatuur (van gas) ~ (2) 2.1.2 pressure (p) is inversely proportional V to volume (V) ¥ druk (p) is omgekeerd eweredig~ aan die volume(V) ~“ Not indirectly proportional/NIE indirek eweredig nie) as the pressure increases, the volume decreases “ proportionally “ Soos die druk toeneem~, neem die volume toe in verhouding” pressure is directly proportional to yy, ~~ druk is direk eweredig aan }/, NB: Mathematical relationship has to be in words Wiskundige verwantskap moet in woorde wees. (2) 2.1.3. Boyle's Law” ; Boyle se Wet” (1) 2.1.4. more than vv meer as “~~ (2) 2.1.5 low temperatureY and high pressureY lae temperatuur” en hoé druk~” (2) 2.2 2.2.1 Bv (CO2) (1) 2.2.2 Dv (CC&) (1) 2.2.3 Dv(CCh) (1) 2.2.4 Cv (H20) (1) [13] Copyright reserved/Kopiereg voorbehou

Downloaded from hlayiso.com Physical Science/SG/P2/Natuur- en Skeikunde/SG/V2 3 SCE/SSE — Memorandum QUESTION 3/VRAAG 3 3.1 H2SO, + Na2zSO3 —+ Na2zSOQ, + HzO + SO2 OR/OF 2H2SO4, + NazSO3; — 2NaHSO, + H,0 + SO2 LHS V RHS Vv BAL ¥ 3.2 Upward (displacement). v It has a higher density (heavier) than air. ¥ Opwaartse verplasing. » Dit het ‘n hoér digtheid (swaarder) as lug. “ 3.3 A suffocating/burning/choking effect. “ Verstikkende/brandende/versmorende uitwerkingY 3.4 orange/yellow/brownY oranje/geel/bruin ” Fe* = Fe* +e (0/2) 3.5 Green/groenV Fe* +e = Fe*™ (1/2) Fe?* +. Fe* + @& (0/2) 36 Fe*+e + Fe* vv Fe" ~ Fe” + 6 (1/2) QUESTION 4/VRAAG 4 44 4NH3(g) + 50.(g) + 4NO(g) + 6H2O(g) Vw (2 or 0 marks for balancing, accept multiple balancing, ignore =) (2 or 0 punte vir balansering, aanvaar veelvuldige balansering, ignoreer =) 4.1.1 4.1.2 catalytic oxidation of ammonia vv [Only catalytic oxidationv’] katalitiese oksidasie van ammoniak” [Slegs katalitiese oksidasie “] 4.1.3 platinum/rhodium “ 4.2 4.2.1 nitrogen dioxide “ NO2 “ (Mark separately) stikstofdioksied ~ NO2 “ (Merk afsonderlik) 4.2.2 Cu**vv ORIOF copper(I!) ion/koper(Il)-ioon 4.3 4.3.1 (light) yellow” (NOT cream coloured) (lig)geel VV (NIE roomkleurig nie) 4.3.2 Kl + AgNO3; — Agl + KNO3; LHS” RHSY BALY (Accept ionic equation/Aanvaar ioniese vergelyking) Copyright reserved/Kopiereg voorbehou (3) (2) (1) (1) (1) (2) DBE/2013 [10] (2) (2) (1) (2) (2) (2) (3) [14] <> Please turn over/Blaai om asseblief ur’

Downloaded from hlayiso.com Physical Science/SG/P2/Natuur- en Skeikunde/SG/V2 4 SCE/SSE — Memorandum QUESTION S5/VRAAG 5 5.1 exothermic/eksotermies ¥ 5.2 Copyright reserved/Kopiereg voorbehou 6.1.1 5.1.2 2) 5.1.3 5.1.4 (a) (b) 5.1.5 (a) (b) §.2.1 His negative /A H < 0/ Heat is released W A His negatief/A H <0 / Hitte vrygeste! remain the same VV bly dieselfdev V increases neem toev“” increases neem toew~ decreases VY” neem af increases neem toer” According to Le Chatlier's principle an increase in temperaturev favours the endothermic reaction/equilibrium (position) shifts to the left. v Therefore the reverse reaction is favoured. Thus producing less SO3. Voigens Le Chatlier se beginsel sal ‘n toename in temperatuur~“ die endotermiese reaksie bevoordee/ewewig(sposisie) na links skuif. ~ Dus word die teruqwaartse reaksie bevoordeel. “ Dus word minder SO3 geproduseer. YV §.2.2 Orne temperature of Y is higher/greater VV 5.2.3 Die temperatuur van Y is hoér/groter “~~ Crush the marble chunks into powder. ” Increase the concentration of the HC£. ” any 2 Stir/Shake Add catalyst Breek die marmer in kleiner stukkies. “ Verhoog die konsentrasie van die HCt. “ enige 2 Roer/Skud Voeg katalisator by DBE/2013 (1) (1) (2) (2) (2) (2) (2) (3) (1) (2) (2) [20] =f Please turn over/Blaai om asseblief yo

Downloaded from hlayiso.com Physical Science/SG/P2/Natuur- en Skeikunde/SG/V2 5 DBE/2013 SCE/SSE — Memorandum QUESTION 6/VRAAG 6 61 611 Evy (2) 6.1.2 Cv¥v (2) 6.1.3 Cvv (2) 614 AVY (2) 62 62.1 6 + NaOH — NaCf + H,0 LHSY RHSY BALY (3) 6.2.2 YcaV_ on cae Ty a e formula/formule ~ e 0,01 x 30 Coxi2D 1 © Cax12 G,01x 30> 1 e userationg :nmp = 1:1 © 0,025 mol.dm® Ca = 0,025 mol.dm? ~ OR/OF: Naor) = CV =@01 x 0,0 ¥= 0,0003 mol Nwce) =0,0003 mol ~ ratio n _=7 _ v _ 0,0003 |, = 0,025 mol.dm? ~ (5) 6.2.3 equal to 7 ¥ gelyk aan 7 ~ (1) [17] ES Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief un

Downloaded from hlayiso.com Physical Science/SG/P2/Natuur- en Skeikunde/SG/V2 6 SCE/SSE — Memorandum QUESTION 7/VRAAG 7 7.1 7.2 7.3 7.4 7.5 76 Te 78 7.9 S 7.1.1 Znv¥ (zinc/sink”’) DBE/2013 (2) 7.1.2 Zn(NO3)2 “Y (OR other Zn salt/OF ander Zn-sout) (name/naam”) (2) 7.1.3 potassium nitrate or any suitable salt ( not Zn?" or Cu2*)vY kaliumnitraat of enige geskikte oplosbare sout (nie Zn** of Cu*) — (2) completes the circuit “ OR maintains electrical neutrality OR provides a path for the flow of ions voltooi die stroombaan “ OF handhaaf elektriese neutraliteit OF verskaf ‘n pad vir die vioei van ione. (1) Cathode/katodeY (1) eduction takes place at the cathode/Cathode gains electrons” reduksie vind by die katode plaas/katode wen elektrone” (1) (t=) 25 °C VY ORIOF (T =) 298 K (c =) 1 mol.dm*¥ (1 molar/1 M) (2) Zn @ Zn* + 2e (1/2) crease/neem af Vv. zn + 2e = Zn (0/2) (1) Zn?* + 2e — Zn (0/2) Zn + Zn™ + 2evv Zn + 2e ~ Zn (112) (2) Cu?*v¥ OR/Cu(NOs)2 OF copper(!i) ion/koper(!l)-ioon (2) Zn(s)|Zn?*(aq) (1 mol.dm’)v | | ¥Cu?*(aq) (1 mol.dm™)| Cu(s) ~ OR/OF Zn(s)|2rv kaa) ~ | vCu?*(aq)|Cu(s) ¥ (3) OR/OF Zn|Zn?*v||~Cu**|Cuv [19] Copyright reserved/Kopiereg voorbehou => Please turn over/Blaai om asseblief on:

Downloaded from hlayiso.com Physical Science/SG/P2/Natuur- en Skeikunde/SG/V2 aq DBE/2013 SCE/SSE ~ Memorandum QUESTION 8/VRAAG 8 ( Avy (2) 8.2 A is unsaturated. vv OR A has a double bond between C atoms. OR B is saturated. OR B has only single bonds between the C atoms. Ais onversadig. ~“ OF A het 'n dubbelbinding tussen C-atome. OR B is versadig. OF B het slegs enkelbindings tussen C-atome. (2) 8.3 Substitution VY or halogenation “Vv or bromination VW Substitusie “v of halogenering »’v or brominering ~~ (2) 8.4 B and/en DYY (2 or 0) (2) 8.5 methylpropane Y “ or 2—methylpropane VW metielpropaan ~~ of 2-metielpropaan “~~ (2) 8.6 Evv (2) [12] TOTALITOTAAL: 150 —p> Copyright reserved/Kopiereg voorbehou Please turn over/Biaai om asseblief ea