Physical Sciences Grade 12 P2 NSC Supplementary 2013 Memo

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE NASIONALE SENIOR SERTIFIKAAT GRADE/GRAAD 12 PHYSICAL SCIENCES: CHEMISTRY (P2) FISIESE WETENSKAPPE: CHEMIE (V2) FEBRUARY/MARCH/FEBRUARIE/MAART 2013 MEMORANDUM MARKS/PUNTE: 150 This memorandum consists of 16 pages. Hierdie memorandum bestaan uit 16 bladsye. Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com Physical Sciences P1/Fisiese Wetenskappe V2 2 DBE/Feb.–Mar./Feb.–Mrt. 2013 NSC/NSS – Memorandum SECTION A/AFDELING A QUESTION 1/VRAAG 1 1.1 Alcohols/Alkanols  Alkohole/Alkanole  (1) 1.2 Cracking/Elimination  Kraking/Eliminasie  (1) 1.3 (Reaction) rate/Rate (of reaction) (Reaksie-)tempo/Tempo (van reaksie) (1) 1.4 Electrolysis/Elektrolise  (1) 1.5 Haber (process)/Haber(-proses)  (1) [5] QUESTION 2/VRAAG 2 2.1 D  (2) 2.2 B  (2) 2.3 A  (2) 2.4 A  (2) 2.5 C  (2) 2.6 C  (2) 2.7 D  (2) 2.8 B  (2) 2.9 D  (2) 2.10 C  (2) [20] TOTAL SECTION/TOTAAL AFDELING A: 25 Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com Physical Sciences P1/Fisiese Wetenskappe V2 3 DBE/Feb.–Mar./Feb.–Mrt. 2013 NSC/NSS – Memorandum SECTION B/AFDELING B QUESTION 3/VRAAG 3 3.1 3.1.1 E (1) 3.1.2 A (1) 3.1.3 A (1) 3.1.4 F (1) 3.1.5 A  OR/OF D (1) 3.1.6 C (1) 3.2 3.2.1 H H H  Notes/Aantekeninge H C C C C C H Functional group:  Whole structure correct:  H H H H H Funksionele groep:  Hele struktuur korrek:  Notes/Aantekeninge: • Condensed or semistructural formula: 1 2 Gekondenseerde of semistruktuurformule: 1 2 • Molecular formula/Molekulêre formule: 0 (2) 2 3.2.2 H H C H H H H H H H H C C C C C C C H  H H H H H H H C H H Notes/Aantekeninge: • Condensed or semistructural formula:/Gekondenseerde of semistruktuurformule: 1 2 • All bonds shown, one or more H atoms omitted: Max. 1 2 Alle bindings aangetoon, een of meer H-atome uitgelaat: Maks. 1 2 • Wrong number of bonds e.g. C atoms not forming 4 bonds: 0 2 Verkeerde aantal bindings bv. C-atome vorm nie 4 bindings nie: 0 (2) 2 Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com Physical Sciences P1/Fisiese Wetenskappe V2 4 DBE/Feb.–Mar./Feb.–Mrt. 2013 NSC/NSS – Memorandum 3.3 3.3.1 Carbonyl (group)/Karboniel(groep)  (1) 3.3.2 2-methylpropan-1-ol  Notes/Aantekeninge: 2-metielpropan-1-ol  IF/INDIEN: 2 methyl 1 propanol/2 metiel 1 propanol  1 OR/OF 2 2-methyl-1-propanol  2 methylpropan 1 ol/2 metielpropan 1 ol  1 2 2-metiel-1-propanol  (2) [13] QUESTION 4/VRAAG 4 4.1 4.1.1 Gas  (1) 4.1.2 Lower than  - Isomers of A: More branching/Molecules more compact./Smaller surface area (over which the intermolecular forces act.)  Weaker/less intermolecular forces.  Less energy needed to overcome intermolecular forces.  Laer as  - Isomere van A: Meer vertak/Molekule meer kompak./Kleiner oppervlakte (waaroor intermolekulêre kragte werk.)  Swakker/minder intermolekulêre kragte.  Minder energie benodig om intermolekulêre kragte te oorkom.  OR/OF Lower than  - A is less branched./has less compact molecules./has larger surface area (over which intermolecular forces act).  Stronger/more intermolecular forces.  More energy needed to overcome intermolecular forces.  Laer as  - A en B is minder vertak./het minder kompakte molekule./ het groter oppervlakte (waaroor intermolekulêre kragte werk).  Sterker/meer intermolekulêre kragte.  Meer energie benodig om intermolekulêre kragte te oorkom.  (4) Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com Physical Sciences P1/Fisiese Wetenskappe V2 5 DBE/Feb.–Mar./Feb.–Mrt. 2013 NSC/NSS – Memorandum 4.1.3 2C 4 H 10 + 13O 2 → 8CO 2 + 10H 2 O  bal.  Notes/Aantekeninge • Reactants  Products  Balancing  Reaktanse  Produkte  Balansering  • Ignore/Ignoreer ⇌ • Marking rule 3.9/Nasienreël 3.9 (3) 4.1.4 Compound B contains a carbonyl group/O atom (bonded to C atom)  and is a polar (molecule)/dipole.  Verbinding B bevat 'n karbonielgroep/O-atoom (gebind aan 'n C-atoom)  en is 'n polêre (molekuul)/dipool.  (2) 4.2 4.2.1 Compound D: Two sites for hydrogen bonding/forms dimers  Compound C: One site for hydrogen bonding  Verbinding D: Twee punte vir waterstofbindings/vorm dimere  Verbinding C: Een punt vir waterstofbinding  Both compounds have hydrogen bonding (between molecules).  Compound D has two sites for/stronger/more hydrogen bonding./  Beide verbindings het waterstofbindings (tussen molecule). Verbinding D het twee punte vir/sterker/meer waterstofbinding. (2) 4.2.2 - (Compound/Verbinding) C  Lowest boiling point/Laagste kookpunt  (2) [14] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com Physical Sciences P1/Fisiese Wetenskappe V2 6 DBE/Feb.–Mar./Feb.–Mrt. 2013 NSC/NSS – Memorandum QUESTION 5/VRAAG 5 5.1 Primary/Primêr  (1) 5.2 5.2.1 Elimination/dehydration  Eliminasie/dehidrering/dehidrasie  (1) 5.2.2 H H H H H H   H   H C C C C O H H C C C C + O H H H H H H H H H H Functional group/Funksionele groep:  Whole structure correct/Hele struktuur korrek:  Notes/Aantekeninge: • Accept -OH as condensed in structural formula. Aanvaar -OH as gekondenseerd in struktuurformule. • Accept H 2 O as condensed or any shape. Aanvaar H 2 O as gekondenseerd of enige vorm. • Condensed/semistructural formulae or mixture of both: Max. 4 5 Gekondenseerde/semistruktuurformules of mengsel van beide: Maks. 4 5 • Molecular formula for all structures, e.g. C 4 H 10 O: Max. 1 5 Molekulêre formules vir alle strukture, bv. C 4 H 10 O: Maks. 1 5 • Any additional reactants or products: Max. 4 5 Enige addisionele reaktanse of produkte: Maks. 4 5 • Everything correct, wrong balancing: Max. 4 5 Alles korrek, verkeerde balansering: Maks. 4 5 (5) 5.3 5.3.1 Esterification/(Acid catalysed) condensation  Verestering/(Suurgekataliseerde) kondensasie/Esterifikasie  (1) 5.3.2 Notes/Aantekeninge H H H H O H Functional group:    Whole structure correct:  H C C C C O C C H Funksionele groep:  H H H H H Hele struktuur korrek:  (2) Notes/Aantekeninge: • Condensed or semistructural formula: 1 2 Gekondenseerde of semistruktuurformule: 1 2 • Molecular formula/Molekulêre formule: 2 0 Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com Physical Sciences P1/Fisiese Wetenskappe V2 7 DBE/Feb.–Mar./Feb.–Mrt. 2013 NSC/NSS – Memorandum 5.4 5.4.1 Substitution  Substitusie  (1) 5.4.2 1-bromobutane  1-bromobutaan  (2) [13] QUESTION 6/VRAAG 6 6.1 Conical (flask)/Koniese (fles)  OR/OF Erlenmeyer (flask/fles) (1) 6.2 Collect gas produced./Measure volume of gas produced.  Vang bereide gas op./Meet volume gas berei.  (1) 6.3 6.3.1 Concentration/Konsentrasie  (1) 6.3.2 ANY ONE/ENIGE EEN: Temperature  Surface area/State of division Temperatuur  Reaksieoppervlak/Toestand van verdeeldheid (1) 6.4 P - Higher (acid) concentration in experiment 2.  Steeper slope/Greater gradient  Hoër (suur)konsentrasie in eksperiment 2.  Steiler helling/Groter gradiënt.  OR/OF Higher (acid) concentration in experiment 2.  Same volume of gas produced/collected in a shorter time/faster.  Hoër (suur)konsentrasie in eksperiment 2.  Dieselfde volume gas berei/opgevang in 'n korter tyd/vinniger.  (3) 6.5 Concentration of acid decreases as reaction proceeds.  Konsentrasie van suur verminder soos wat die reaksie verloop.  OR/OF Surface area of Zn decreases. Reaksieoppervlak van Zn verminder. (1) Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com Physical Sciences P1/Fisiese Wetenskappe V2 8 DBE/Feb.–Mar./Feb.–Mrt. 2013 NSC/NSS – Memorandum 6.6 V Mark Allocation/Puntetoekenning n(H 2 ) = Vm • Substitute volume. 0,24  = Vervang volume. 24,04  • Substitute molar volume. = 0,01 mol  Vervang molêre volume. n(Zn) = m • n(H 2 ) = 0,01 mol M • n(Zn) = n(H 2 ) m • Substitute/Vervang 65 g·mol-1. ∴ 0,01 = 65  • Answer/Antwoord ∴m = 0,65 g  OR/OF 1 mole/mol H 2 gas = 24,04 dm3 0,01 mol/mol H 2 gas = 0,24 dm3 65 g Zn = 1 mole/mol  0,65 g  = 0,01 mole/mol  (6) [14] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com Physical Sciences P1/Fisiese Wetenskappe V2 9 DBE/Feb.–Mar./Feb.–Mrt. 2013 NSC/NSS – Memorandum QUESTION 7/VRAAG 7 7.1 - Exothermic  ∆H is negative./less than zero.  - Eksotermies  ∆H is negatief./kleiner as nul.  OR/OF - Exothermic/Eksotermies  Energy is released./Energie word vrygestel.  (2) 7.2 7.2.1 - Greater than/Greater at t 1 than at t 2 .  Larger/Steeper gradients/slopes.  - Groter as/Groter by t 1 as t 2 . Groter/steiler gradiënte/hellings. OR/OF at t 2 than at t 1 .  - Smaller Smaller/less steep gradients/slopes.  - Kleiner by t 2 as by t 1 . Kleiner/minder steil gradiënte/hellings.  (2) 7.2.2 Equal to/Gelyk aan  (1) 7.2.3 CALCULATIONS USING NUMBER OF MOLES BEREKENINGE WAT AANTAL MOL GEBRUIK Mark allocation/Puntetoekenning • Initial amount of reactants: n(HCℓ) = 1 mol & n(O 2 ) = 0,3 mol  Aanvanklike hoeveelheid reaktanse: n(HCℓ) = 1 mol & n(O 2 ) = 0,3 mol • Equilibrium/Ewewig: n(O 2 ) = 0,1 mol  • USING ratio/GEBRUIK verhouding: 4 : 1 : 2 : 2  • Equilibrium: n(HCℓ) = 0,2 mol (initial – change)  Ewewig: n(HCℓ) = 0,2 mol (aanvanklik – verandering) • Equilibrium: n(H 2 O) = n(Cℓ 2 ) = 0,4 mol (initial + change)  Ewewig: n(H 2 O) = n(Cℓ 2 ) = 0,4 mol (aanvanklik – verandering) • Divide by volume/Gedeel deur volume (5 dm3)  • Correct K c expression (formulae in square brackets)  Korrekte K c -uitdrukking (formules tussen vierkanthakies)  • Substitution of concentrations/Vervanging van konsentrasies  • Final answer/Finale antwoord: 800  Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com Physical Sciences P1/Fisiese Wetenskappe V2 10 DBE/Feb.–Mar./Feb.–Mrt. 2013 NSC/NSS – Memorandum Option 1/Opsie 1: From graph/Uit grafiek: Initially/Aanvanklik n(HCℓ) = 1 mol & n(O 2 ) = 0,3 mol  At equilibrium/By ewewig n(O 2 ) = 0,1 mol  Ratio/verhouding:  n(HCℓ) reacted/gereageer = 4n(O 2 ) reacted/gereageer n(H 2 O) formed/gevorm = n(Cℓ 2 ) formed/gevorm = 2n(O 2 ) reacted/gereageer = 2(0,2) = 0,4 mol At equilibrium/By ewewig: n(HCℓ) = 0,2 mol/(initial/aanvanklik – change/verandering)  n(H 2 O) = n(Cℓ 2 ) = 0,4 mol (initial/aanvanklik + change/verandering)  Equilibrium concentration/Ewewigskonsentrasies: n 0,2 c(HCℓ) = = = 0,04 mol∙dm-3 V 5 n 0,1 c(O 2 ) = = = 0,02 mol∙dm-3 V 5 Divide by 5  n 0,4 -3 Deel deur 5 c(H 2 O) = = = 0,08 mol∙dm V 5 n 0,4 c(Cℓ 2 ) = = = 0,08 mol∙dm-3 V 5 [H O] [C 2 ]2 2 (0,08)2 (0,08)2 KC = 2  ∴  = 800  [HC]4 [O2 ] (0,04 )4 (0,02) No KC expression, correct substitution/Geen Kc -uitdrukking, korrekte substitusie: Max./Maks. 8 9 Wrong KC expression/Verkeerde Kc-uitdrukking: Max./Maks. 6 9 Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com Physical Sciences P1/Fisiese Wetenskappe V2 11 DBE/Feb.–Mar./Feb.–Mrt. 2013 NSC/NSS – Memorandum Option 2/Opsie 2 HCℓ O2 H2O Cℓ 2 Initial quantity (mol) 1 0,3  0 0 Aanvangshoeveelheid (mol) Change (mol) Verandering (mol) -0,8 -0,2 + 0,4 + 0,4 ratio  verhouding Quantity at equilibrium (mol)/ 0,2 0,1 0,4 0,4  Hoeveelheid by ewewig(mol) 0,2 0,1 0,4 0,4 Equilibrium concentration (mol∙dm-3) Divide by 5 Ewewigskonsentrasie (mol∙dm-3) 5 5 5 5 (0,04) (0,02) (0,08) (0,08) Deel deur 5 [H2O]2 [C 2 ]2 (0,08)2 (0,08)2 KC =  ∴  = 800  [HC]4 [O2 ] (0,04 )4 (0,02) No KC expression, correct substitution/Geen Kc-uitdrukking, korrekte substitusie: Max./Maks. 8 9 Wrong KC expression/Verkeerde Kc-uitdrukking: Max./Maks. 6 9 CALCULATIONS USING CONCENTRATIONS BEREKENINGE WAT KONSENTRASIES GEBRUIK Mark allocation/Puntetoekenning • Initial concentration of reactants/Aanvanklike konsentrasie van reaktanse: c(HCℓ) = 0,2  & c(O 2 ) = 0,06 mol∙dm-3  • Equilibrium/Ewewig:c(O 2 ) = 0,02 mol∙dm-3  • USING ratio/GEBRUIK verhouding: 4 : 1 : 2 : 2  • Equilibrium: c(HCℓ) = 0,04 mol (initial – change)  Ewewig: c(HCℓ) = 0,04 mol (aanvanklik – verandering) • Equilibrium/Ewewig: c(H 2 O) = c(Cℓ 2 ) = 0,08 mol (initial + change)  Ewewig: c(H 2 O) = c(Cℓ 2 ) = 0,08 mol (aanvanklik + verandering) • Correct K c expression (formulae in square brackets).  Korrekte K c -uitdrukking (formules tussen vierkanthakies). • Substitution of concentrations/Vervanging van konsentrasies.  • Final answer/Finale antwoord: 800  Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com Physical Sciences P1/Fisiese Wetenskappe V2 12 DBE/Feb.–Mar./Feb.–Mrt. 2013 NSC/NSS – Memorandum Option 3/Opsie 3 HCℓ O2 H2O Cℓ 2 Initial concentration (mol∙dm ) -3 1 3  Divide by 5  Aanvangshoeveelheid (mol∙dm-3) = 0,2 = 0,06 0 0 5 5 Change (mol∙dm-3) ratio  -0,16 -0,04 +0,08 +0,08 Verandering (mol∙dm-3) Equilibrium concentration (mol∙dm-3)  0,04  0,02 0,08 0,08 Ewewigskonsentrasie (mol∙dm-3) [H 2 O] 2 [C 2 ] 2 (0,08) 2 (0,08) 2 KC =  ∴  = 800  [HC] 4 [O 2 ] (0,04 )4 (0,02) No KC expression, correct substitution/Geen Kc uitdrukking, korrekte substitusie: Max./Maks. 8 9 Wrong KC expression/Verkeerde Kc-uitdrukking: Max./Maks. 6 9 (9) 7.3 Decreases  - Higher temperature favours the endothermic reaction.  The reverse reaction is favoured.  Less products/more reactants.  Verminder  - Hoër temperatuur bevoordeel die endotermiese reaksie.  Die terugwaartse reaksie word bevoordeel.  Minder produkte/meer reaktanse.  (4) 7.4 7.4.1 Decreases/Verminder  (1) 7.4.2 Remains the same/Bly dieselfde  (1) 7.4.3 Decreases/Verminder  (1) [21] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com Physical Sciences P1/Fisiese Wetenskappe V2 13 DBE/Feb.–Mar./Feb.–Mrt. 2013 NSC/NSS – Memorandum QUESTION 8/VRAAG 8 8.1 Pressure/Druk: 101,3 kPa (1,013 x 105 Pa)  Temperature/Temperatuur: 25 °C (298 K)  (2) 8.2 Salt bridge/Soutbrug  (1) 8.3 Anode  - It/ Mg is a stronger reducing agent  than H2  and (Mg) will be oxidised.  Dit/Mg is 'n sterker reduseermiddelas H 2  en (Mg) sal geoksideer word.  OR/OF - Anode  H 2 is a weaker reducing agent  than Mg/ it.  and Mg will be oxidised.  H 2 .is 'n swakker reduseermiddel as Mg/dit en Mg sal geoksideer word.  (4) 8.4    Mg(s) | Mg2+(1 mol∙dm-3) || H+(1 mol∙dm-3) | H 2 (g) | Pt(s) OR/OF    Mg(s) | Mg2+(aq) || H+(aq) | H 2 (g)|Pt(s) OR/OF   Mg | Mg2+ || H+ | H 2 | Pt Accept/Aanvaar: Mg | Mg2+ || H+ | H 2 , Pt (3) 8.5 Option 1/Opsie 1 Notes/Aantekeninge Eθ cell = Eθ cathode - Eθ anode  Accept any other correct formula from the 2,36  = 0,00 – (Eθ anode )  data sheet. Eθ anode = -2,36 V  Aanvaar enige ander korrekte formule vanaf gegewensblad. Option 2/Opsie 2 Any other formula using unconventional abbreviations, e.g. E° cell = E° OA - E° RA Mg → Mg 2+ + 2e - E° = +2,36  2H+ + 2e- → H 2 E° = 0,00  followed by correct substitutions: 3 4 E° = 2,36 V  Enige ander formule wat Mg (red. pot.) = -2,36 V  onkonvensionele afkortings gebruik bv. E° sel = E° OM - E° RM (4) Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com Physical Sciences P1/Fisiese Wetenskappe V2 14 DBE/Feb.–Mar./Feb.–Mrt. 2013 NSC/NSS – Memorandum 8.6 Mg(s) + 2H+(aq)  → Mg2+(aq) + H 2 (g)  Bal.  Notes/Aantekeninge • Reactants  Products  Balancing  Reaktanse  Produkte  Balansering  • Ignore if phases are omitted./Ignoreer indien fases uitgelaat word. • Ignore/Ignoreer ⇌ • Marking rule 3.9/Nasienreël 3.9 • Marking rule 3.4: One mark is forfeited when the charge of an ion is omitted per equation (not for the charge on an electron). Nasienreël 3.4: Een punt word verbeur per vergelyking indien die lading op 'n ioon uitgelaat word (nie vir die lading op 'n elektron nie.) (3) [17] QUESTION 9/VRAAG 9 9.1 Electrolytic/Elektrolities  (1) 9.2 9.2.1 A (1) 9.2.2 B (1) 9.3 9.3.1 Remains the same  - The rate of oxidation of copper at the anode is equal  to the rate of reduction of copper(II) ions at the cathode.  Bly dieselfde  - Die tempo van oksidasie van koper by die anode is gelyk aan  Die tempo van reduksie van koper(II)-ione by die katode.  (3) 9.3.2 Cu → Cu2+ + 2e-  Notes/Aantekeninge Cu ⇌ Cu2+ + 2e- (1 ) 2 Cu + 2e → Cu 2+ - (0 ) 2 Cu2+ + 2e- ← Cu ( 2 ) 2 Cu2+ + 2e- ⇌ Cu (0 ) 2 (2) 9.4 9.4.1 It contains precious metals/valuable/expensive metals.  Dit bevat edelmetale/waardevole/duur metale.  (1) 9.4.2 Consumes large amount of electricity/energy.  Depletes coal resources. OR Contributes to global warming. OR Habitats destroyed in mining of coal. OR Contributes to acid rain.  Verbruik groot hoeveelhede elektrisiteit/energie.  Put steenkoolbronne uit. OF Dra by tot aardverwarming. OF Habitatte word vernietig. OF Dra by tot suurreën.  (2) [11] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com Physical Sciences P1/Fisiese Wetenskappe V2 15 DBE/Feb.–Mar./Feb.–Mrt. 2013 NSC/NSS – Memorandum QUESTION 10/VRAAG 10 10.1 Secondary (cells)/Sekondêre (selle)  (1) 10.2 Zn(s) + NiO 2 (s) + 2H 2 O(ℓ)  → Zn2+(aq) + Ni(OH) 2 (s) + 2OH-(aq) bal  Notes/Aantekeninge: • Reactants  Products  Balancing  Reaktanse  Produkte  Balansering  • Ignore if phases are omitted / Ignoreer indien fases uitgelaat word • Ignore/Ignoreer ⇌ • Marking rule/Nasienreël 3.9 (3) 10.3 10.3.1 The ability (of a cell) to store/deliver charge. Die vermoë (van 'n sel) om lading te stoor/lewer. (2) 10.3.2 OPTION 1/OPSIE 1 W = Vq  = (1,65)(1 500 x 10-3 x 3600)  = 8 910 J  OPTION 2/OPSIE 2 q = I∆t = (1 500 x 10-3)(3 600)  ∴ q = 5 400 C W = Vq  W = (1,65)(5 400)  = 8 910 J  (4) [10] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com Physical Sciences P1/Fisiese Wetenskappe V2 16 DBE/Feb.–Mar./Feb.–Mrt. 2013 NSC/NSS – Memorandum QUESTION 11/VRAAG 11 11.1 11.1.1 Nitrogen/Stikstof/N 2  (1) 11.1.2 Hydrogen/Waterstof/H 2  (1) 11.1.3 Ammonium nitrate/Ammoniumnitraat/NH 4 NO 3  (1) 11.2 11.2.1 Contact process/Kontakproses  (1) 11.2.2 2NH 3 + H 2 SO 4 → (NH 4 ) 2 SO 4  Bal.  Notes/Aantekeninge: • Reactants  Products  Balancing  Reaktanse  Produkte  Balansering  • Ignore/Ignoreer ⇌ • Marking rule/Nasienreël 3.9 (3) 11.3 11.3.1 Catalytic oxidation of ammonia  Katilitiese oksidasie van ammoniak  (1) 11.3.2 4NH 3 + 5O 2  → 4NO + 6H 2 O  Balancing/Balansering  Notes/Aantekeninge: • Reactants  Products  Balancing  Reaktanse  Produkte  Balansering  • Ignore/Ignoreer ⇌ • Marking rule/Nasienreël 3.9 (3) 11.3.3 NO 2/ Nitrogen dioxide  Notes/Aantekeninge NO 2/ Stikstofdioksied  Accept: Nitrogen(IV) oxide  Aanvaar: Stikstof(IV)oksied (1) [12] TOTAL SECTION B/TOTAAL AFDELING B: 125 GRAND TOTAL/GROOTTOTAAL: 150 Copyright reserved/Kopiereg voorbehou