Physical Sciences Grade 12 P2 Eastern Cape Mock 2021 QP

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE SEHLOPHA SA 12 THUTO YA TSA MAHLALE: CHEMISTRY (P2) PREPARATORY 2021 MATSHWAO: 150 NAKO: Dihora tse 3 Pampiri ena e na le maqephe a 16 le di datha shiti tse 4. *PSSES2*  Ha o a dumellwa ho kopa Ka kopo phetla

Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 2. DBE/Pudungwana 2020 SC/NSC DITAELO LE TLHAISO-LESEDING 1. Ngola nomoro ya hao ya tlhahlobo le nomoro ya tulo eo o ngollang ho yona dibakeng tse nepahetseng BUKENG YA HO ARABELA. 2. Pampiri ena e na le dipotso tse LESHOME. Arabela dipotso tsohle BUKENG YA HO ARABELA. 3. Qala potso KA NNGWE leqepheng le LETJHA BUKENG YA HO ARABELA. 4. Nomora dikarabo ka nepo jwalo ka ha ho entswe pampiring ena ya dipotso. 5. Siya mola O LE MONG dipakeng tsa dipotswana tse pedi, mohlala, dipakeng tsa POTSO YA 2.1 le POTSO YA 2.2. 6. O ka se sebedisa sesebediswa sa ho bala (calculator) se sa porokerengwang. 7. O ka disebedisa dihlomo tse nepahetseng tsa dipalo. 8. Bontsha diforomo TSOHLE le tsela eo di kenyelleditsweng ka yona dipalong TSOHLE. 9. QETELLONG, phethela dikarabo tsa hao ka ho sebedisa bonnyane dinomoro TSE PEDI tsa di desimali. 10. Fana ka lebaka, tlhaloso, le tse ding ka bokgutshwanyane moo ho hlokehang. 11. O eletswa ho sebedisa DI DATHA SHITI tse hokelletsweng. 12. Ngola ka makgethe le ka mongolo o balehang. Ha o a dumellwa Ka kopo phetla

Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 3. DBE/Pudungwana 2020 SC/NSC POTSO YA 1: DIPOTSO TSA KGETHO O filwe dikgetho tse fapaneng tse ka kgonehang tse latelang. Kgetha karabo e be o ngola feela tlhaku (A–D) pela nomoro ya potso (1.1 ho isa ho 1.10) bukeng ya ho arabela, mohlala 1.11 E. 1.1 Ke EFE ho tse latelang e leng ALEKAINE? A C6H8 B C6H10 C C6H12 D C6H14 (2) 1.2 Di-Esta di fumaneha ka ketsahalo e pakeng tsa di-okaniki kompaonte, ya X le ya Y, moo ho nang le lequlwana la fankeshenale. Maqulwana a fankeshenale ho dikompaonte tsena ke: Kompaonte ya X Kompaonte ya Y A Lequlwana la hydroxyl Lequlwana la carboxyl B Lequlwana la hydroxyl Lequlwana la carbonyl C Hydroxide ion Lequlwana la carboxyl D Hydroxide ion Lequlwana la carbonyl (2) 1.3 Ha buthane e le tlasa motjheso le kgatello tse hodimo, ho fumaneha ketsahalo e latelang: Buthane ื methane + Y Ke EFE ho tse latelang e emetseng Y? A CHCCH3 B CH2CHCH3 C CH3CH2CH3 D CH3CHCHCH3 (2) Ha o a dumellwa Ka kopo phetla

Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 4. DBE/Pudungwana 2020 SC/NSC 1.4 Motswako wa haeterokeloriki asiti, HCℓ(aq), ya konsentereshene ya 1 mol∙dm-3 o e eketswa ho makenesiamo YA PHOFO E SETSENG ho 25 °C. Mothinya wa I ka tlase o emetse mothamo wa kgase ya haeterojene ketsahalong. Mothinya wa II o fumanehile maemong a fapaneng ka ho sebedisa MOTHAMO O TSHWANANG wa motswako wa haeterokeloriki asiti. Ke efe ho tse latelang e emetseng maemo a sebedisitsweng ho fumana mothinya wa II? MAEMO A HO KONSENTERESHENE MOTJHESO AROHANA A Mg YA ASITI (°C) (mol·dm-3) A Ribone 0,5 25 B Ribone 2 25 C Phofo 1 20 D Phofo 1 30 (2) 1.5 Ke EFE ho tse latelang diketsahalo tsa ho lekana e FUMANTSHANG ho ata ha dihlahiswa ha MOTHAMO wa setshelo o nyolotswe ka motjheso o tshwanang? A N2O4(g) ֖2NO2(g) B H2(g) + I2(g) ֖ 2HI(g) C N2(g) + 3H2(g) ֖ 2NH3(g) D 2SO2(g) + O2(g) ֖ 2SO3(g) (2) Ha o a dumellwa Ka kopo phetla

Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 5. DBE/Pudungwana 2020 SC/NSC 1.6 Ke EFE polelo ho tse latelang e NEPAHETSENG ho ketsahalo ya EKESOFEMIKI? A Matla a mangata a monngwe ho feta ho lokollwa. B Matla a mangata a lokollwa ho feta ho monngwa. C Motjheso wa ketsahalo (ΔH) o phosithifo. D Matla a sehlahiswa a maholo ho feta matla a di reaketente. (2) 1.7 Shebisisa tekano e latelang. H3PO4(aq) + H2O(ℓ) ⇌ H3O+(aq) + H2PO4 (aq) Ke EFE ho tse latelang e leng bobedi ba konjakeiti asiti-base? A H3O+(aq) le H2O(ℓ) B H3PO4(aq) le H2O(ℓ) C H3PO4(aq) le H3O+(aq) D H3O+(aq) le H2PO4 (aq) (2) 1.8 Shebisisa tekano e balansitseng ketsahalong e latelang: 2Cr2+(aq) + Sn4+(aq) → 2Cr3+(aq) + Sn2+(aq) KEMEDI E OKESITAESANG ke: A Cr2+(aq) B Cr3+(aq) C Sn2+(aq) D Sn4+(aq) (2) Ha o a dumellwa Ka kopo phetla

Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 6. DBE/Pudungwana 2020 SC/NSC 1.9 Eleketerokemikale sele e hokelletswe ho latela maemo a lekaneng. Ho fanwe ka kemedi ya sele seleng e latelang. Mg(s) | Mg2+(aq) || Pb2+(aq) | Pb(s) Jwale sele e hokelletswe ho etsa sekete. Ke EFE kerafo ho tse latelang e emetseng konsentereshene ya di eleketerolayete ka NEPO ka mora nako e telele? A B C D (2) 1.10 Mekotla e mmedi ya 50 kg, e nang le sematlafatsi sa R le sa S ka bonngwe, e nomoruwe ka ho latelang: Sematlafatsi sa R: 3 : 1 : 5 (20) Sematlafatsi sa S: 1 : 2 : 6 (20) Kgetha sematlafatsi tse loketseng kgolo ya lehaba le matlafetseng le kgolo ya methapo e matlafetseng. KGOLO YA LEHABA KGOLO YA MOTHAPO A R R B S R C R S D S S (2) [20] Ha o a dumellwa Ka kopo phetla

Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 7. DBE/Pudungwana 2020 SC/NSC POTSO 2 (Qala leqepheng le letjha.) Ditlhaku tsa A ho isa ho E tafoleng e latelang di emetse diokanike kompaonte. H Br CH3 CH2CH3 A H C C C C H B CxHy H H CH3 CH2CH3 H H H O H C H C C C C C H D CH3(CH2)2CH(OH)CH2CH3 H H H H E CH3CH2CH2CH2CH2CH2CHCH2 2.1 Ngola TLHAKU e emetseng E NNGWE LE E NNGWE ya tse latelang: 2.1.1 Ketone (1) 2.1.2 Hydrocarbon (1) 2.1.3 Alkene (1) 2.2 Ngola: 2.2.1 Lebitso la IUPAC ya kompaonte ya A (3) 2.2.2 FOROMO YA SEEMO ya kompaonte ya D (2) 2.2.3 Lebitso la IUPAC la KETANE E TSEPAMENG YA AESOMARA YA TSHEBETSO ya kompaonte ya C (2) 2.3 Kompaonte ya B ke kompaonte ya ketane e tsepameng e etsahala ho latela ketsohalo ya ekesothemiki: 2CxHy + 25O2(g) → 16CO2(g) + 18H2O(g) 2.3.1 Ka ntle le hoba ekesothemiki, ke mofuta ofe wa ketsahalo e bontshitsweng ka hodimo? (1) 2.3.2 Fumana FOROMO YA MOLEKULARA ya kompaonte ya B. (2) Ketsahalo e ka hodimo e etsahala setshelong se kwahetsweng motjhesong o sa fetoheng o ka hohimo ho 100 °C le kgatello e sa fetoheng. 2.3.3 Bala MOTHAMO O FELLETSENG wa kgase e entsweng ka setshelong ha 50 cm3 ya CxHy e kopana ka ho felletseng le okesejene. (3) [16] Ha o a dumellwa Ka kopo phetla

Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 8. DBE/Pudungwana 2020 SC/NSC POTSO 3 (Qala leqepheng le letjha.) Dikompaonte A, B le C di sebedisitswe ho fuputsa e nngwe ya tshusumetso ya ntlha ya ho bela ha di okaniki kompaonte. Ho fanwe ka diphetho tsa phuputso tafoleng e latelang. KOMPAONTE NTLHA YA HO BELA (°C) A Butan-1-ol 117 B Butan-2-ol 100 C 2-methylpropan-2-ol 82 3.1 Ana ke phuputso e se nang leeme? Kgetha ho E kapa TJHE. (1) 3.2 Fana ka lebaka la karabo ya hao ho POTSO 3.1. (1) 3.3 Hlalosa ka botlalo phapang pakeng tsa ntlha ya ho bela ha dikompaonte B le C. (3) 3.4 Hlalosa lebitso isomara ya tulo. (2) 3.5 Ho dikompaonte A, B le C, kgetha ntlha e emetseng E NNGWE LE E NNGWE ho tse latelang: 3.5.1 Isomara ya tulo (1) 3.5.2 Tertiary alekohole Fana ka lebaka la karabo ya hao. (2) 3.6 Kerafo e latelang e emetse kamano pakeng tsa kgatello ya moyafatso le motjheso wa kompaonte ya A (butan-1-ol). Kgatello ya moyafatso (kPa) X 117 Motjheso (°C) 3.6.1 Ngola boleng ba X. (1) 3.6.2 Boela o taka kerafo e ka hodimo bukeng ya ho araba. Seteng e le nngwe ya akisisi, taka mothinya o tla fumaneha mabapi le kompaonte ya C. Bontsha methinya A le C. Bontsha dintlha tsa ho bela tsa bohlokwa kompaonteng ya C kerafong. (2) [13] Ha o a dumellwa Ka kopo phetla

Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 9. DBE/Pudungwana 2020 SC/NSC POTSO 4 (Qala leqepheng le letjha.) 4.1 Nehelletsano setshwantshong se latelang e bontsha kopano ya diokaniki tse fapaneng ho sebediswa propane e le reaketente ya qalo. R, T le U di emetse diokaniki kompaonte tse fapaneng. Kompaonte ya T ke CARBOXYLIC ASITI mme kompaonte ya U ke ISOMARA YA TSHEBETSO ya pentanoic asiti. Ketsahalo ya 1 Ketsahalo ya 2 Propane Propan-1-ol Br2 NaOH e taelutiweng T Ketsahalo ya 3 Ngola LEBITSO la mofuta wa ketsahalo e bontshitsweng ke: 4.1.1 Ketsahalo ya 1 (1) 4.1.2 Ketsahalo ya 2 (1) Shebisisa ketsahalo ya 1 le ketsahalo ya 2. 4.1.3 Ngola lebitso la IUPAC la kompaonte ya R. (2) Ketsahalo ya 3 e etsahala botenng ba katalisiti le motjheso. Ngola: 4.1.4 LEBITSO kapa FOROMO ya katalisiti (1) 4.1.5 Lebitso la IUPAC la kompaonte ya T (2) 4.1.6 FOROMO YA SEEMO ya kompaonte ya U (2) Ha o a dumellwa Ka kopo phetla

Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 10. DBE/Pudungwana 2020 SC/NSC 4.2 Tekinishiene ya laboratoring e batla ho etsa but-2-ene e sebedisa but-1-ene e le reajente ya qalo, jwalo ka ho bontsitswe ka tlase. H H H C C C C H But-2-ene H H H H Dikemikale tse latelang di fumaneha laboratoring: Mokedikedi o loileng wa H2O Mokedikedi o loileng H2SO4 wa NaOH Kgetha kemikale e hlokehang ho itokisetsa kaho lethathamong le ka hodimo. Kgatong ka NNGWE ya ho itokisa, fana ka FOROMO YA SEEMO mabapi le dikompaonte. Bontsha dikemikale tse hlokehang kgatong ka nngwe. (6) [15] POTSO 5 (Qala leqepheng le letjha.) 5.1 Bala mothinya wa karolelwano ya Maxwell-Boltzmann ketsahalong e itseng e lateng. Q P P le Q di bontsha diakisisi. Ke boholo bo bokae bo bontshitsweng ke: 5.1.1 P (1) 5.1.2 Q (1) 5.2 Mola wa R o bontsha bonnyane ba matla a hlokehang hore ketsahalo e etsahale . 5.2.1 Fana ka lentswe le emetseng polelo e sehetsweng mola (1) ka tlase. 5.2.2 Sebaka se ditsweng kerafong se ameha jwang ha katalisiti e ekeditswe? Kgetha ho e a ATA, FOKOTSEHA kapa DULA E LE JWALO. (1) 5.3 Sebedisa fiyori ya thulano ho hlalosa hore katalisiti e se ama jwang sekgahla sa ketsahalo. (4) Ha o a dumellwa Ka kopo phetla

Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 11. DBE/Pudungwana 2020 SC/NSC 5.4 Ketsahalo pakeng tsa calcium carbonate e PHOFO, CaCO3(s), le hydrochloric asiti E SETSENG, HCℓ(aq), e sebediswa ho fuputsa sekgahla sa ketsahalo ho 25 °C. Tekano e balansitseng ya ketsahalo ke: CaCO3(s) + 2HCℓ(aq) → CaCℓ2(aq) + H2O(ℓ) + CO2(g) Dipatlisiso tse mmalwa di entswe ka ho sebedisa boima bo lekanang ba calcium carbonate E SA HLWEKANG le dikonsentereshene tse fapaneng tsa qalo tsa hydrochloric asiti e taelutiweng. Kerafo e latelang e emetse diphetho tse fumanweng. Hakanya hore tse sa hlwekang ha di a kopana. 60 ● Sekgahla se bohareng sa phumantsho ya 50 ● ● 40 ● 3 -1 30 CO2(cm ∙min ) ● 20 ● 10 ● 0 0 0,005 0,01 0,015 0,02 0,025 0,03 0,035 Konsentereshene ya qalo ya HCℓ (mol∙dm-3) Phuputsong ena, ngola: 5.4.1 Bariebole e laolehang (1) 5.4.2 Sephetho (2) CaCO3(s) ho 6 g ya sampole e sa hlwekang e kopana ka ho phethahala le 0,03 mol൉dm-3 ya HCℓ(aq) metsotsong e 26. 5.4.3 Sebedisa tlhaiso leseding kerafong ho bala peresente ya tlhweko ya calcium carbonate. Hakanya hore mothamo wa kgase wa molara ho 25 °C ke 24 000 cm3. (6) [17] Ha o a dumellwa Ka kopo phetla

Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 12. DBE/Pudungwana 2020 SC/NSC POTSO 6 (Qala leqepheng le letjha.) Mmowane, H2O(g), o kopana le carbon e tjhesang, C(s), ho 1 000 °C ho latela tekano e latelang e balansitseng: 2H2O(g) + C(s) ֖ 2H2(g) + CO2(g) Qalong, 36 g ya mmowane le boima bo itseng ba carbon di ile tsa bewa ho 2 dm3 setshelo se kwahetsweng mme tsa lokollwa hore di kopane. Maemong a tekanyo, ho ile ha fumanwa hore boima bo itseng ba carbon bo fetohile ka 0,225 mol. 6.1 Hlalosa lebitso boemo bo lekaneng ba dynamic. (2) 6.2 Bala konsetente ya boemo bo lekaneng, Kc, ketsahalong e ho 1 000 °C. (8) 6.3 Kerafo e bontsha kamoo sekgahla sa diketsahalo, e yang pele le eyang morao, di fetohang ha nako e tsamaya. Sekgahla Ketsahalo e yang pele Ketsahalo e yang morao t0 t1 t2 t3 Nako 6.3.1 Fan aka lebaka la hore hobaneng sekgahla sa ketsahalo e yang pele se fokotseha pakeng tsa t0 le t1. (1) 6.3.2 Ke efe phetoho e etsahetseng motswakong wa boemo ba (1) tekanyo ka t3? Ha nako e le t2, motjheso wa sisitime o a nyoloha. 6.3.3 Ana ketsahalo e yang pele ke EKESOFEMIKI kapa (1) ENTOFEMIKI? 6.3.4 Sebedisa porinsepole wa Le Chatelier’s ho hlalosa karabo ya POTSO 6.3.3. (2) [15] Ha o a dumellwa Ka kopo phetla

Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 13. DBE/Pudungwana 2020 SC/NSC POTSO 7 (Qala leqepheng le letjha.) Dikopi tse pedi, ya A le ya B, di na le di-base tse matla. Kopi ya A: 500 cm3 ya barium hydroxide, Ba(OH)2(aq) e nang le konsentereshene e sa tsebisahaleng ya X Kopi ya B: 400 cm3 e nang le potassium hydroxide, KOH(aq) ya konsentereshene ya 0,1 mol·dm-3 7.1 Hlalosa base ho latela molao wa Arrhenius. (2) 7.2 Bala dinomoro tsa domole tsa ( OH ) koping ya B. (2) 7.3 Dikarahe tse dikoping tsa A le B di kopantswe mmoho koping ya C. Motswako o koping ya C o na le pH ya 13. Ho hakanngwa hore methamo e ka eketseha le motjheso wa metswako ke 25 °C. 3 0,1 mol·dm-3 Ba(OH)2(aq) 500 cm pH = 13 400 cm 3 KOH(aq) 7.3.1 Bala konsentereshene, ya X, ho Ba(OH)2 koping ya A. (8) Motswako koping ya C e thaetereituweng le ethanoic asiti. Ho fumanehile hore 15 cm3 e lekanya 30 cm3 ya asiti. Tekano e balansitseng ke: CH3COOH(aq) + OH (aq) → CH COO (aq) + H2O(ℓ) 7.3.2 Ana ethanoic asiti, CH3COOH(aq), ke asiti e FOKOLANG kapa asiti e MATLA? Fana ka ka tlhaloso karabong ya hao. (2) 7.3.3 Bala konsentereshene ya ethanoic asiti. (4) [18] Ha o a dumellwa Ka kopo phetla

Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 14. DBE/Pudungwana 2020 SC/NSC POTSO 8 (Qala leqepheng le letjha.) Sele ya galvanic e maemong a lekaneng e bontshitswe ka kemedi ya sele jwalo ka ha e bontshitswe ka tlase. X le Y ke dieleketerote tse tsa tsebisahaleng. X | Zn2+(aq) || Fe3+(aq) , Fe2+(aq) | Y 8.1 Ngola LEBITSO le FOROMO ya: 8.1.1 Eleketerote ya X (1) 8.1.2 Eleketerote ya Y (1) 8.1.3 Kemedi e okesitaesang (1) 8.2 Ngola: 8.2.1 Mosebetsi O LE MONG wa eleketerote ya Y (1) 8.2.2 Ketsahalo e mahareng e etsahala eleketeroteng ya Y (2) 8.2.3 Tekano ya nete (kaofela) ya kemedi ya sele e etsahala seleng ena. (3) 8.3 Bala emf ya qalo seleng ena. (4) 8.4 Ekaba emf ya qalo ya sele e anngwa jwang ke konsentereshene ya di-ion tsa tshepe(III) e fetohela ho 0,6 mol∙dm-3? Kgetha ho e a ATA, FOKOTSEHA kapa e DULA E TSHWANA. (1) [14] Ha o a dumellwa Ka kopo phetla

Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 15. DBE/Pudungwana 2020 SC/NSC POTSO 9 (Qala leqepheng le letjha.) Setshwantso se latelang se bebofaditsweng se emetse sele ya eleketerokemikale e sebedisitsweng ho hlwekisa koporo. Koporo e sa hlwekang e na le boima bo itseng ba silibera (Ag) le senke (Zn) e le tsona ditshilafatsi. Mohlodi wa DC Koporo e sa hlwekang Eleketerolaete 9.1 Hlalosa lebitso eleketerolaesese. (2) 9.2 Ngola LEBITSO le FOROMO ya di-ion tse pedi tse fumanehang ho eleketerolaete. (2) 9.3 Ngola ketsahalo e mahareng e etsahalang ho kafote. (2) 9.4 Sheba Tafole ya Maemo a diretakeshene Potential o be o hlalose hore hobaneng koporo e hlwekisitsweng E KEKE e be le lesenke. (3) 9.5 Bala boima bo hodimo ba Cu e etsahetseng haeba dimole tse 0,6 tsa dieleketerone di fetisitswe. (3) [12] Ha o a dumellwa Ka kopo phetla

Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 16. DBE/Pudungwana 2020 SC/NSC POTSO 10 (Qala leqepheng le letjha.) 10.1 Neheletswano setshwantshong se latelang e bontsha mokgwa neng o fumaneha ha ho etswuwa sematlafatsi sa C. Kgase ya A Mokgwa wa Haber H2SO4(aq) Kompaonte ya Sematlafatsi B sa C H2(g) Ngola LEBITSO le FOROMO ya: 10.1.1 Kgase ya A (1) 10.1.2 Katalisiti e sebedisitsweng mokgweng wa Haber (1) 10.1.3 Kompaonte ya B (1) Ngola: 10.1.4 Lebitso la mokgwa o sebedisitsweng ho hlahisa kgase ya A (1) 10.1.5 Tekano e balansitseng ha ho etswa sematlafatsi sa C (3) 10.2 Mokotla wa 40 kg wa sematlafatsi o na le 65% ya setlatselletsi. Boima ba manoni mokotleng bo bontshitswe tafoleng e latelang. MANONI BOIMA (kg) Naeterojene x Foseforase 2x Potasiamo 5 Bala dikarolwana tsa NPK sematlafatsing. (3) [10] KAKARETSO YA MATSHWAO: 150 a Ha o a dumellwa ho kopa Ka kopo phetla

Downloaded1.from hlayiso.com Thuto ya tsa mahlale/P2 NSC DBE/Pudungwana 2020 DATA FOR PHYSICAL SCIENCES GRADE 12 PAPER 2 (CHEMISTRY) DATHA YA THUTO YA TSA MAHLALE SEHLOPHA SA 12 PAMPIRI YA 2 (CHEMISTRY) TABLE 1: PHYSICAL CONSTANTS/TAFOLE YA 1: D I FISIKALE KONSETENTE NAME/LEBITSO SYMBOL/LETSHWAO VALUE/BOLENG Standard pressure pT 1,013 x 105 Pa Kgatello e lekantsweng Molar gas volume at STP Vm 22,4 dm3∙mol-1 Kgase ya mothamo wa molara ho STD Standard temperature Motjheso o lekantsweng T T 273 K Charge on electron e -1,6 x 10-19 C Tjhatjhe ya eleketerone Avogadro's constant NA 6,02 x 1023 mol-1 Lenane le sa fetoheng la Avogadro TABLE 2: FORMULAE/TAFOLE YA 2: DIFOROMO m N n n M NA n m V c or/of c n V MV Vm cava na pH = -log[H3O+] cbvb nb Kw = [H3O+][OH-] = 1 x 10-14 at/by 298 K Eθ Eθ  Eθ / Eθ Eθ  Eθ cell cathode anode sele kafote anote or/kapa Eθ Eθ  Eθ / Eθ Eθ  Eθ cell reduction oxidation sele redakeshene okeseteeshene or/kapa Eθ Eθ  Eθ / Eθ Eθ  Eθ cell oxidisingagent reducingagent sele kemedi e okesetaesang kemedi e-rejusehang Ha o a dumellwa ho kopa Ka kopo phetla

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DBE/Pudungwana 2020 Thuto ya tsa mahlale/P2 2. NSC TABLE 3: THE PERIODIC TABLE OF ELEMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 (I) (II) Atoomgetal (III) (IV) (V) (VI) (VII) (VIII) KEY/ SLEUTEL Atomic number 1 2 H He 2,1 1 4 29 3 4 Elektronegatiwiteit Simbool 5 6 7 8 9 10 Li Be Electronegativity 1,9 Cu Symbol B C N O F Ne 1,0 1,5 63,5 2,0 2,5 3,0 3,5 4,0 7 9 11 12 14 16 19 20 11 12 13 14 15 16 17 18 Na Mg Benaderde relatiewe atoommassa Aℓ Si P S Cℓ Ar 0,9 1,2 1,5 1,8 2,1 2,5 3,0 23 24 Approximate relative atomic mass 27 28 31 32 35,5 40 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr 0,8 1,0 1,3 1,5 1,6 1,6 1,5 1,8 1,8 1,8 1,9 1,6 1,6 1,8 2,0 2,4 2,8 39 40 45 48 51 52 55 56 59 59 63,5 65 70 73 75 79 80 84 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe 0,8 1,0 1,2 1,4 1,8 1,9 2,2 2,2 2,2 1,9 1,7 1,7 1,8 1,9 2,1 2,5 86 88 89 91 92 96 101 103 106 108 112 115 119 122 128 127 131 55 56 57 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tℓ Pb Bi Po At Rn 0,7 0,9 1,6 1,8 1,8 1,9 2,0 2,5 133 137 139 179 181 184 186 190 192 195 197 201 204 207 209 87 88 89 Fr Ra Ac 58 59 60 61 62 63 64 65 66 67 68 69 70 71 0,7 0,9 226 Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu 140 141 144 150 152 157 159 163 165 167 169 173 175 90 91 92 93 94 95 96 97 98 99 100 101 102 103 Downloaded from hlayiso.com Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr 232 238

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Downloaded from hlayiso.com 3. Thuto ya tsa mahlale/P2 SC/NSC DBE/Pudungwana 2020 TABLE 4A: STANDARD REDUCTION POTENTIALS/TEKANYO YA DIRETAKESHENE POTENTIAL Half-reactions/Halfreaksies ( ˥ (V) F2(g) + 2e ⇌ 2F + 2,87  Co 3+ +e ⇌ Co2+ + 1,81 H2O2 + 2H+ +2e ⇌ 2H2O +1,77  2+ MnO 4 + 8H+ + 5e ⇌ Mn + 4H2O + 1,51   Cℓ2(g) + 2e ⇌ 2Cℓ + 1,36 2 Cr2O 7 + 14H+ + 6e ⇌ 2Cr3+ + 7H2O + 1,33 +  O2(g) + 4H + 4e ⇌ 2H2O + 1,23 MnO2 + 4H+ + 2e ⇌ Mn2+ + 2H2O + 1,23 2+  Pt + 2e ⇌ Pt + 1,20   Br2(ℓ) + 2e ⇌ 2Br + 1,07  NO 3 + 4H+ + 3e ⇌ NO(g) + 2H2O + 0,96 Increasing oxidising ability/Ho eketseha ha bokgoni ba ho okesetaesa 2+  Hg + 2e ⇌ Hg(ℓ) + 0,85 Increasing reducing ability/Ho eketseha ha bokgoni bo rejusang +  Ag + e ⇌ Ag + 0,80  NO 3 + 2H+ + e ⇌ NO2(g) + H2O + 0,80 3+  2+ Fe +e ⇌ Fe + 0,77 O2(g) + 2H+ + 2e ⇌ H2O2 + 0,68   I2 + 2e ⇌ 2I + 0,54 Cu+ + e ⇌ Cu + 0,52 SO2 + 4H+ + 4e ⇌ S + 2H2O + 0,45 2H2O + O2 + 4e ⇌ 4OH + 0,40 2+  Cu + 2e ⇌ Cu + 0,34 2 SO 4 + 4H+ + 2e ⇌ SO2(g) + 2H2O + 0,17 2+  + Cu +e ⇌ Cu + 0,16 Sn4+ + 2e ⇌ Sn2+ + 0,15 +  S + 2H + 2e ⇌ H2S(g) + 0,14 2H+ + 2e ⇌ H2(g) 0,00 Fe3+ + 3e ⇌ Fe  0,06 Pb2+ + 2e ⇌ Pb  0,13 2+  Sn + 2e ⇌ Sn  0,14 Ni2+ + 2e ⇌ Ni  0,27 Co2+ + 2e ⇌ Co  0,28 2+  Cd + 2e ⇌ Cd  0,40 Cr3+ + e ⇌ Cr2+  0,41 Fe2+ + 2e ⇌ Fe  0,44 Cr3+ + 3e ⇌ Cr  0,74 2+  Zn + 2e ⇌ Zn  0,76 2H2O + 2e ⇌ H2(g) + 2OH  0,83 Cr2+ + 2e ⇌ Cr  0,91 Mn2+ + 2e ⇌ Mn  1,18 3+  Aℓ + 3e ⇌ Aℓ  1,66 Mg2+ + 2e ⇌ Mg  2,36 Na+ + e ⇌ Na  2,71 Ca2+ + 2e ⇌ Ca  2,87 2+  Sr + 2e ⇌ Sr  2,89 Ba2+ + 2e ⇌ Ba  2,90 Cs+ + e- ⇌ Cs - 2,92 K+ + e ⇌ K  2,93 +  Li + e ⇌ Li  3,05

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Downloaded from hlayiso.com Thuto ya tsa mahlale/P2 DBE/Pudungwana 2020 20. SC/NSC TABLE 4B: STANDARD REDUCTION POTENTIALS TABEL 4B: STANDAARD-REDUKSIEPOTENSIALE Half-reactions/Halfreaksies (˥ (V) + Li + e ⇌ Li  3,05 + K + e ⇌ K  2,93 Cs + e + ⇌ Cs  2,92 2+ Ba + 2e ⇌ Ba  2,90 Sr + 2e 2+ ⇌ Sr  2,89 2+ Ca + 2e ⇌ Ca  2,87 Na + e + ⇌ Na  2,71 2+ Mg + 2e ⇌ Mg  2,36 Aℓ + 3e 3+ ⇌ Aℓ  1,66 2+ Mn + 2e ⇌ Mn  1,18 Cr + 2e 2+ ⇌ Cr  0,91 2H2O + 2e ⇌ H2(g) + 2OH  0,83 Increasing reducing ability/Toenemende reduserende vermoë Zn + 2e 2+ ⇌ Zn  0,76 3+ Cr + 3e ⇌ Cr  0,74 2+ Fe + 2e ⇌ Fe  0,44 2+ Cr + e 3+ ⇌ Cr  0,41 Increasing oxidising ability Cd + 2e 2+ ⇌ Cd  0,40 2+ Co + 2e ⇌ Co  0,28 2+ Ni + 2e ⇌ Ni  0,27 2+ Sn + 2e ⇌ Sn  0,14 Pb + 2e 2+ ⇌ Pb  0,13 Fe + 3e 3+ ⇌ Fe  0,06 + 2H + 2e H2(g) 0,00 + S + 2H + 2e ⇌ H2S(g) + 0,14 4+ 2+ Sn + 2e ⇌ Sn + 0,15 2+ + Cu + e ⇌ Cu + 0,16 2 + SO + 4H + 2e ⇌ SO2(g) + 2H2O + 0,17 2+  Cu + 2e ⇌ Cu + 0,34 2H2O + O2 + 4e ⇌ 4OH + 0,40 SO2 + 4H + 4e + ⇌ S + 2H2O + 0,45 + Cu + e ⇌ Cu + 0,52 I2 + 2e ⇌ 2I + 0,54 O2(g) + 2H + 2e + ⇌ H2O2 + 0,68 3+ 2+ Fe + e ⇌ Fe + 0,77  + NO + 2H + e ⇌ NO2(g) + H2O + 0,80 Ag + e + ⇌ Ag + 0,80 Hg + 2e 2+ ⇌ Hg(ℓ) + 0,85  + NO + 4H + 3e ⇌ NO(g) + 2H2O + 0,96 Br2(ℓ) + 2e ⇌ 2Br + 1,07 2+  Pt + 2 e ⇌ Pt + 1,20 2+ MnO2 + 4H + 2e + ⇌ Mn + 2H2O + 1,23 O2(g) + 4H + 4e + ⇌ 2H2O + 1,23 2 Cr2O + 14H + 6e + 3+ ⇌ 2Cr + 7H2O + 1,33   Cℓ2(g) + 2e ⇌ 2Cℓ + 1,36  MnO + 8H + 5e + 2+ ⇌ Mn + 4H2O + 1,51 +  H2O2 + 2H +2 e ⇌ 2H2O +1,77 3+ 2+ Co + e ⇌ Co + 1,81 F2(g) + 2e ⇌ 2F  + 2,87 Ha o a dumellwa ho kopa

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