Physical Sciences Memo 2 (English & Afrikaans)

Common 2017 — Grade 12 / Matric — Physical Sciences

Memo 2017 Grade 12 Bilingual Physical Sciences Hub →

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🎯 150 marks 📄 12 pages 📝 67 items found 📚 3 topics

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Q1— Section header —

1.1(2\

1.2(2\

1.3(2\

1.4(2\

1.5(2\

1.6(2\

1.7(2\

1.8(2\

1.9(2\

1.10(2\ [20]20

Q2— Section header —

2.1A covalent bond is the sharing of electrons between two atoms to form a molecule. n Kovalente binding is die deel van elektrone tussen twee atome van moleku (2\

2.2.1(2\

2.2.2(2\

2.3/zero Geen/nul (1\

2.5O is angular /bent hoekig

2.5.2

2.6(The charge distribution in\ CH is asymmetrical and CH is symmetrical. (Die verspreiding van lading in\ is asimmetries en CH is simmetries. The chlorine ha a higher electronegativity than the hydrogen.

Q3— Section header —

3.1Both water and ethanol have hydrogen bonds Beide water en etanol het waterstofbindings which are the same in relative strength. wat dieselfde relatiewe sterkte is. Substances with comparable relative strength in intermolecular forces will

3.2

2.4(1\

3.3

3.4Bromine Broom

3.5NEGATIVE MARKING FROM 3.4 NEGATIEWE NASIEN VANAF 3.4 The boili ng point of bromine is lower than the other two liquids therefor

Q4— Section header —

4.1Refer to the last page of the marking guidelies for the graph drawn to scale Verwys na die laaste bladsy van die nasienriglyne vir die skaalgrafiek Criteria for marking the graph se of correct scale on both axis

4.2Pressure of an enclosed gas is directly proportional to the temperature if the volume stays constant. Druk van n ingeslote gas is direk eweredig aan die temperatuur indien die volume konstant bly

4.3At very low temperature values, the gas will liquify , not acting like a gas anymore. Teen baie lae tempertuurwaardes sal die gas vervloei en nie soos n gas optree nie

4.4If the temperature increases, the average kinetic energy of the particles increases. Indien die temperatuur verhoog, neem die gemiddelde kinetiese energie van die deeltjies toe The particles move faster.

4.5High temperature temperatuur Low pressure Lae druk (2\

4.6Accept any combination of coordinates from the graph for example: Aanvaar enige kombinasie van ko rdinate vanaf die grafiek byvoorbeeld: Gradient = Gradient = 450 280 = 0,62 Gradient =

4.7POSITIVE MARKING FROM 4.6 POSITIEWE NASIEN VANAF

4.6n = 1,5 mole mol From Vanaf pV = nRT Gradient = NOTE: Pressure is in kPa on graph

Q5— Section header —

5.1= 226 47

5.2pV = nRT (105 000\(12,6\ = n(8,31\(298\ n = 534,25 mole mol

Q6— Section header —

6.1(aq (g\ (2\ The catalyst lowers the activation energy of the reaction n Katalisator verlaag die aktiv erings

6.2.1Magnesium , the mass of magnesium after 3 minutes/at the end of the reaction was zero nesium die massa magnesium na 3 minute/aa n die einde van die reaksie was nul

6.2.2n = 0,18 mole mol gebruik n = 0,05 mole/ mol Mg reacted reageer

Q7— Section header —

7.1The minimum energy needed for a reaction to take place. Die minimum ener benodig vir die reaksie om plaas te vind. (2\

7.2An exothermic reaction releases energy H < 0 Eksotermiese reaksie stel energie vry H < 0 (2\

7.3MARKING CRITERIA NASIEN KRITERIA Activation energy E correct position and labelled Aktiveringsenergie E korrekte posisie en benoem Heat of reaction H correct position and labelled

7.411

Q8— Section header —

8.1A base is proton acceptor n Basis is n protonontvanger (2\

8.1.2NaOH (aq\ balance/ balans

1.3Sodium sulphate Natriumsulfaat

1.4HSO (2\

1.5HSO O and

8.2.1OPTION 1 OPSIE 1 c = 0,3 mol.dm OPTION 2 OPSIE 2 n = 0,15 mol e / mol c = 0,3 mol.dm

8.2= 0, 15 mole mol NaOH NaOH : NH 1 : 1 m = 8,025 g NH 80,25 % pure suiwer

Q9— Section header —

9.1(2\

9.2Gain of electrons Opneem van elektrone

9.3the o 2 to die oksidasiegetal neem toe van +2 na +3 (2\ /Cr (2\

9.52Cr

9.66Fe 6Fe 2Cr 2Cr (3\ [13] QUESTION/ VRAAG1013

10.1Miners do not have to risk their lives going deep or being trapped underground. Mynwerkers het nie 'n lewensgevaarlike risiko om ondergronds vas te val nie. No risk of sink holes Daar ontstaan nie sinkgate nie

10.2Reduction, Reduksie die oksidasiegetal van yster neem af van 6+ na 0 (2\

10.3Carbon is a non renewable recource Koolstof is 'n nie hernubare bron Carbon dioxide as product can increase global warming Koolstofdioksied as produk kan aardverwarming vererger OR/ Any other relevant answer

10.4The gold does not oxidiz e easily like iron. Die goud oksideer nie so maklik soos yster nie

10.5It acts as oxidising agent. Dit tree op as oksideermiddel (2\ [10 TOTAL/ TOTAAL

4.1GRAPH OF PRESSURE VERSUS TEMPERATURE/ GRAFIEK VAN DRUK TEENOOR TEMPERATUUR Pressure/ Druk (kPa\ Temperature/ Temperatuur (K\

Topics Identified

MechanicsChemical BondingThermodynamics

Mark Allocation

Total150 marks

Sections20 + 11 + 22 + 19 + 11 + 13 = 96 marks

Paper information

SubjectPhysical Sciences

Year2017

SessionCommon

TypeMemo

PaperPaper 2

LanguageBilingual

Pages12

Downloads4

Examination context

Decade2010s

Years ago9y

Season—

Start day—

Exam period—

Days since exam—

About Physical Sciences examination preparation

Grade 12 Physical Sciences combines Physics and Chemistry. Paper 1 covers mechanics, electricity, waves, and optics, while Paper 2 focuses on chemical bonding, organic chemistry, and electrochemistry.

Every available Grade 12 Physical Sciences past paper and memorandum is collected in the Physical Sciences hub at physical-science.freemode.co.za — browse all years, sessions and languages in one place.

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applying scientific principles

selecting appropriate equations

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performing calculations with correct units

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