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GAUTENGSE DEPARTEMENT VAN ONDERWYS
PROVINSIALE EKSAMEN
NOVEMBER 2020
GRAAD 10
FISIESE WETENSKAPPE (CHEMIE)
VRAESTEL 2
NASIENRIGLYNE
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Gr10 Phy P2 (Afrikaans) 2020 Exemplars Possible Answers_hlayiso.com_.pdf
Physical Sciences · Grade 10 · Gauteng November · 2020 · Afrikaans. Memorandum, 5 pages. Read online or download the PDF.
- Subject
- Physical Sciences
- Grade
- Grade 10
- Language
- Afrikaans
- Document type
- Memorandum
- Year
- 2020
- Exam period
- Gauteng November
- Paper
- 2
- Pages
- 5
- File size
- 266.2 KB
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FISIESE WETENSKAPPE (CHEMIE)
NASIENRIGLYNE
Vraestel 2 GR 10
VRAAG 1: MEERVOUDIGEKEUSE VRAE
1.1 A (2)
1.2 A (2)
1.3 B (2)
1.4 C (2)
1.5 D (2)
[10]
VRAAG 2
2.1 2.1.1 Vloeistof (1)
2.1.2 Die temperatuur van ʼn vloeistof waar sy dampdruk gelyk is aan die
atmosferiese druk. (2)
2.1.3 32 ° C (punte mag toegeken word vir 30 tot 35° C) (2)
2.1.4 (a) toeneem (1)
(b) Bly dieselfde (1)
2.1.5 Gedurende die interval het die deeltjies dieselfde temperatuur.
Temperatuur is die maatstaf van die gemiddelde kinetiese energie
van die deeltjies. Die energie van die verhitting is gebruik vir die
potensiële energie tydens die fase verandering. (3)
[10]
VRAAG 3
3.1 3.1.1 19
3.1.2 20
3.1.3 19
3.1.4 24
3.1.5 10 (5)
3.2 Atome van dieselfde element wat dieselfde getal protone het, maar
verskillende getalle neutrone het. (2)
3.3 (7)(6) (93)(7)
Ar(Li) = = 6,93
100 (3)
[10]
2
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FISIESE WETENSKAPPE (CHEMIE)
NASIENRIGLYNE
Vraestel 2 GR 10
VRAAG 4
4.1 Die oordrag van elektrone om katione en ione te vorm wat mekaar aantrek
om ʼn formule-eenheid te vorm. (2)
4.2 MgCℓ2 (2)
4.3 4.3.1
3 energie vlakke Vlak 1 en 2 volledig 7 valenselektrone in vlak 4 (3)
4.3.2 3s² 3p5 (1)
4.4 1s² 2s² 2p6 3s² (2)
4.5
2 x Cℓ–
Mg2+ + 2Cℓ– → MgCℓ2 (4)
[14]
3
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FISIESE WETENSKAPPE (CHEMIE)
NASIENRIGLYNE
Vraestel 2 GR 10
VRAAG 5
5.1 Die eenvoudigste heelgetalverhouding van atome in ʼn verbinding. (2)
5.2
Pb : N :O
n = 0,302 mol Pb
1 :2 :6 of
Pb(NO3)2
n = 0,604 mol N
n = 1,816 mol O (6)
[8]
VRAAG 6
6.1 A: 2SO2(g) + 3O2 → 2SO3(g)
B: 2KCℓO3(s) → 2KCℓ(s) + 3O2(g)
C: 2Aℓ + Fe2O3 → Al2O3(s) + 2Fe(s)
D: 2C2H6(g) + 7O2(g) → 4CO2 + 6H2O(g) (4)
6.2 Die Wet van Konstante Samestelling bepaal dat verskillende voorbeelde van ʼn
suiwer verbinding altyd dieselfde elemente in dieselfde massa-
verhouding bevat. (2)
4
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FISIESE WETENSKAPPE (CHEMIE)
NASIENRIGLYNE
Vraestel 2 GR 10
6.3 2NaBr(aq) + Cℓ2(g) → 2NaCℓ(aq) + Br2(ℓ)
m = 206 g NaBr
m = 71 g Cℓ2 206 + 71 = 277 g reaktante
m = 117 g NaCℓ
m = 160 g Br2 117 + 160 = 277 g produkte
Massa van reaktante is gelyk aan massa van produkte; massa het behoue
gebly. (5)
[11]
VRAAG 7
7.1 waterige oplossing of oplossing met water as die oplosmiddel. (1)
7.2
n = 0,316 mol Na2CO3 (3)
7.3 1 mol Na2CO3 reageer met 2 mol HCℓ
0,316 mol Na2CO3 reageer met 0,632 mol HCℓ (2)
7.4 Om te toets vir CO2 (1)
[7]
TOTAAL: 70
5
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