Technical Sciences Grade 12 P2 Eastern Cape Mock 2025 Memo

NATIONAL SENIOR CERTIFICATE/ NASIONALE SENIOR SERTIFIKAAT GRADE/GRAAD 12 SEPTEMBER 2025 TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 MARKING GUIDELINE/ NASIENRIGLYN MARKS/PUNTE: 75 This marking guideline consists of 10 pages./ Hierdie nasienriglyn bestaan uit 10 bladsye.

2 TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 (EC/SEPTEMBER 2025) QUESTION/VRAAG 1 1.1 D ✓✓ (2) 1.2 B ✓✓ (2) 1.3 A ✓✓ (2) 1.4 B ✓✓ (2) 1.5 C ✓✓ (2) [10] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

(EC/SEPTEMBER 2025) TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 3 QUESTION/VRAAG 2 2.1 An atom or a group of atoms that determine the chemistry of a molecule. ✓✓ ʼn Atoom of ʼn groep atome wat die chemie van ʼn molekuul bepaal. OR/OF An atom or a group of atoms that determine(s) the physical and chemical properties of a group of organic compounds. ʼn Atoom of ʼn groep atome wat die fisiese en chemiese eienskappe van ʼn groep organiese verbindings bepaal. (2) 2.2 2.2.1 Formyl group/Formielgroep ✓ (1) 2.2.2 Carboxyl group/Karboksielgroep ✓ (1) 2.3 2.3.1 D✓ (1) 2.3.2 H✓ (1) 2.3.2 G✓ (1) 2.4 3-bromo-4-methyl ✓ hexane ✓ 3-bromo-4-metielheksaan (2) 2.5 2.5.1 ✓ ✓ MARKING CRITERIA/NASIENKRITERIA: • Correct functional group/ Korrekte funksionele groep  • Whole structure correct/ Hele struktuur korrek  NOTE: If a bond or hydrogen is missing 1/2 LET WEL: As 'n binding of waterstof ontbreek 1/2 (2) Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

4 TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 (EC/SEPTEMBER 2025) 2.5.2 ✓ ✓ MARKING CRITERIA/NASIENKRITERIA: • Correct functional group/ Korrekte funksionele groep  • Whole structure correct/ Hele struktuur korrek  NOTE: If a bond or hydrogen is missing 1/2 LET WEL: As 'n binding of waterstof ontbreek 1/2 (2) [13] QUESTION/VRAAG 3 3.1 The temperature at which the solid and liquid phases of a substance are at equilibrium. ✓✓ Die temperatuur waarby die vaste-en vloeistoffases van ʼn stof in ewewig is. (2) 3.2 Carboxylic acids/Karboksielsure ✓ (1) 3.3 Chain length/Kettinglengte ✓ OR/OF Number of carbon atoms/Aantal koolstofatome. (1) 3.4 Compound P/Ethanoic acid contain (London forces and) hydrogen bonds.✓ Compound S/Ethane contain only London forces/induced dipole forces/ dispersion forces ✓ Hydrogen bonds/intermolecular forces in compound P/ Ethanoic acid are stronger than London forces/intermolecular forces/induced dipole forces/ dispersion forces in compound S/Ethane.✓ More energy is needed to overcome the intermolecular forces/bonds in compound P/Ethanoic acid than in compound S/Ethane ✓ Verbinding P/Etanoësuur bevat (London-kragte en) waterstofbindings. Verbinding S/Etaan bevat slegs London-kragte/geïnduseerde dipoolkragte/dispersiekragte Waterstofbindings/intermolekulêre kragte in verbinding P/Etanoësuur is sterker as London-kragte/intermolekulêre kragte/geïnduseerde dipoolkragte/dispersiekragte in verbinding S/Etaan. Meer energie word benodig om die intermolekulêre kragte/bindings in verbinding P/Etanoësuur te oorkom as in verbinding S/Etaan Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

(EC/SEPTEMBER 2025) TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 5 OR/OF Compound S/Ethane contains only London forces/induced dipole forces/ dispersion forces. Compound P/Ethanoic acid contains (London forces and) hydrogen bonds. London forces/intermolecular forces/ induced dipole forces/dispersion forces in compound S/Ethane are weaker than hydrogen bonds /intermolecular forces in compound P/ Ethanoic acid. Less is energy needed to overcome the intermolecular forces/bonds in compound S/ Ethane than in compound P/Ethanoic acid Verbinding S/Etaan bevat slegs London-kragte/geïnduseerde dipoolkragte/ dispersiekragte. Verbinding P/Etanoësuur bevat (London kragte en) waterstofbindings. London-kragte/intermolekulêre kragte/geïnduseerde dipoolkragte/ dispersiekragte in verbinding S/Etaan is swakker as waterstofbindings/intermolekulêre kragte in verbinding P/Etanoësuur. Minder energie word benodig om die intermolekulêre kragte/bindings in verbinding S/Etaan te oorkom as in verbinding P/Etanoësuur (4) 3.5 Compound S/Ethane Verbinding S/Etaan ✓ Θ Ethane has the lowest melting point/weakest intermolecular force.✓ Etaan het die laagste smeltpunt/swakste intermolekulêre krag. (2) [10] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

6 TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 (EC/SEPTEMBER 2025) QUESTION/VRAAG 4 4.1 4.1.1 Addition/hydration ✓ Addisie/Hidrasie (1) 4.1.2 Substitution/ Hydrolysis (of haloalkanes) ✓ Substitusie/Hidrolise (van haloalkane) (1) 4.1.3 Addition/Hydrogenation ✓ Addisie/Hidrogenasie/Hidrogenering (1) 4.2. 4.2.1 No water must be present. ✓ Geen water moet teenwoordig wees nie. (1) 4.2.2 +  ✓ ✓ ✓ MARKING CRITERIA/NASIENKRITERIA: • 1 mark for each reactant /1 punt vir elke reaktant  • 1 mark for the product /1 punt vir die produk  (3) 4.3 4.3.1 Pentan ✓-2-ol ✓ Accept/Aanvaar: 2 - Pentanol (2) 4.3.2 H2SO4/H3PO4 ✓ (1) 4.4 C5H12 + 8O2 ✓→ 5CO2 + 6H2O ✓ (Balancing/Balansering) ✓ MARKING CRITERIA/NASIENKRITERIA: • 1 mark for the reactants/1 punt vir die reaktante  • 1 mark for the products/1 punt vir die produkte  • 1 mark for balancing/1 punt vir balansering  (3) [13] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

(EC/SEPTEMBER 2025) TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 7 QUESTION/VRAAG 5 5.1 Doping ✓ Dotering/Doepatoevoeging (1) 5.2 N-type (semiconductor)/N-tipe (halfgeleier) ✓ Θ Doping silicon with a group 5 element, (such as phosphorus) will produce negative charge carriers(electrons) ✓ Dotering/Doepatoevoeging van silikon met ʼn groep 5-element, (soos fosfor) sal negatiewe ladingdraers (elektrone) produseer (2) 5.3 p-type/p-tipe n-type/n-tipe ✓ ✓ MARKING CRITERIA/NASIENKRITERIA: • 1 mark for positive terminal of the cell/battery connected to the p-type semiconductor. • 1 mark for negative terminal of the cell/battery connected to the n-type semiconductor. • 1 punt vir positiewe terminaal van die sel/battery aan die p-tipe halfgeleier gekoppel. • 1 punt vir negatiewe terminaal van die sel/battery aan die n-tipe halfgeleier gekoppel. (2) [5] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

8 TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 (EC/SEPTEMBER 2025) QUESTION/VRAAG 6 6.1 An electrochemical cell that converts electrical energy to chemical energy. ✓✓ ʼn Elektrochemiese sel waarin elektriese energie na chemiese energie omgeskakel word. (2) 6.2 X✓ (1) 6.3 6.3.1 CuCℓ2 ✓ (1) 6.3.2 Chlorine/Chloor/Cℓ2 ✓ (1) 6.3.3 2Cℓ-(aq)→ Cℓ2(g)+ 2e- ✓✓ MARKING CRITERIA/NASIENKRITERIA: 2Cℓ- → Cℓ2(g)+ 2e- 2⁄2 2Cℓ- ⇌ Cℓ2 + 2e- 1⁄ 2 Cℓ2+ 2e- → 2Cℓ- 0⁄ Cℓ2+ 2e- ⇌ 2Cℓ- 0⁄ 2 2 NOTE/LET WEL: • Do not penalise if the phases are omitted. Moenie penaliseer as die fases uitgelaat word nie • Ignore if charge on electron is omitted. Ignoreer as lading op elektron uitgelaat is. (2) 6.3.4 Cu2+ ✓ (1) 6.4 Increase/Toeneem ✓ Θ Reduction occurs at electrode X/cathode. ✓✓ Reduksie vind by elektrode X/katode plaas. OR/OF Cu2+ is reduced to Cu. Cu2+ word tot Cu gereduseer. OR/OF Electrode X is connected to the negative terminal of the battery. Elektrode X is aan die negatiewe terminaal van die battery gekoppel. (3) [11] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

(EC/SEPTEMBER 2025) TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 9 QUESTION/VRAAG 7 7.1 SPONTANEOUS/ SPONTAAN ✓ Θ θ 𝜃 EMF (Ecell ) is positive/EMK (𝐸𝑠𝑒𝑙 ) is positief ✓ OR/OF No external power source is required/ Geen eksterne kragbron word benodig nie OR/OF Chemical energy is converted to electrical energy/ Chemiese energie word na elektriese energie omgeskakel OR/OF Exothermic reaction/ Eksotermiese reaksie (2) 7.2 Concentration/Konsentrasie: 1mol.dm-3 ✓ Temperature/Temperatuur: 25°C ✓/298 K (2) 7.3 OPTION/OPSIE 1 θ θ θ Ecell/𝑠𝑒𝑙 = Ecathode/𝑘𝑎𝑡𝑜𝑑𝑒 − E𝑎𝑛𝑜𝑑𝑒 ✓ θ 0,63 = −0,13 − E(𝐗) ✓ θ E(𝐗) = −0,76 V ✓ X is Zinc/Sink (Zn) ✓ OPTION/OPSIE 2 X→ X2+ + 2e- ✓ Pb2+ + 2e-  Pb θ E(𝐗) = −0,76 V ✓ θ Ecathode/𝑘𝑎𝑡𝑜𝑑𝑒 = −0,13 V θ ✓ Ecell/𝑠𝑒𝑙 = 0,63 V X is Zinc/Sink (Zn)✓ Marking guideline/Nasienriglyn • Accept any other correct formula from the data sheet. Aanvaar enige ander korrekte formule uit die datablad. • Penalise with one mark for using unconventional or incomplete formula. Penaliseer met een punt vir die gebruik van onkonvensionele of onvolledige formule. (4) Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

10 TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 (EC/SEPTEMBER 2025) 7.4 7.4.1 Pb2+(aq) + 2e- → Pb(s) ✓✓ MARKING CRITERIA/NASIENKRITERIA: Pb2++2e-→ Pb 2⁄ Pb2++2e- ⇌ Pb 1⁄ 2 2 Pb→ Pb2++2e- 0⁄ Pb⇌ Pb2++2e- 0⁄ 2 2 NOTE/LET WEL: • Do not penalise if the phases are omitted. Moenie penaliseer as die fases uitgelaat word nie. . • Ignore if charge on electron is omitted. Ignoreer as lading op elektron uitgelaat is. (2) 7.4.2 Zn(s) │ Zn2+(aq) ✓║✓ Pb2+(aq) │ Pb(s) ✓ MARKING CRITERIA/NASIENKRITERIA: • Do not penalise if phases/concentrations are omitted. Moenie penaliseer as fases/konsentrasies uitgelaat word nie. (3) [13] ( TOTAL/TOTAAL: 75 Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief