Physical Sciences Grade 10 P2 Gauteng June 2016 Memo (Afr)

Downloaded from hlayiso.com GAUTENG DEPARTMENT OF EDUCATION / GAUTENGSE DEPARTEMENT VAN ONDERWYS PROVINCIAL EXAMINATION / PROVINSIALE EKSAMEN JUNE / JUNIE 2016 GRADE / GRAAD 10 PHYSICAL SCIENCES / FISIESE WETENSKAPPE (PAPER/VRAESTEL 2) MEMORANDUM 8 pages 1

Downloaded from hlayiso.com MEMORANDUM Physical Sciences P2 / Fisiese Wetenskappe V2 GAUTENG DEPARTMENT OF EDUCATION / GAUTENGSE DEPARTEMENT VAN ONDERWYS PROVINCIAL EXAMINATION / PROVINSIALE EKSAMEN PHYSICAL SCIENCES P2/ FISIESE WETENSKAPPE V2 QUESTION 1 / VRAAG 1 1.1 B  1.2 A  1.3 A  1.4 D  1.5 C  1.6 A  1.7 C  1.8 C  1.9 C  1.10 A  [20] QUESTION 2 / VRAAG 2 Definitions: all or nothing Definisies: alles of niks 2.1 2.1.1 Heterogenous mixture consists of substances that are visibly different or are in different phases. OR A mixture with distinguishable particles that are not in the same phase.  A (Oil & water)  any one If learner did not use examples from given mixtures mark B (Sand & water) incorrect Heterogeniese mengsel wat bestaan uit stowwe wat duidelik verskillend voorkom of in verskillende fases is OF ʼn Mengsel met onderskeibare deeltjies wat nie in dieselfde fase is nie  A (Olie & water)  enige Indien ‘n leerder nie die gegewe voorbeelde een van mengsels gegee het nie, merk verkeerd B (Sand & Water) (3) 2.1.2 Homogenous mixtures are substances that are evenly distributed throughout the mixture.  OF A mixture where the component particles are all in the same phase.  C (Oros & water)  any If learner did not use examples from given mixtures mark incorrect D (Salt & water) one 2

Downloaded from hlayiso.com MEMORANDUM Physical Sciences P2 / Fisiese Wetenskappe V2 Homogeniese mengsel is waar stowwe eweredig versprei is deur die mengsel.  OF ʼn Mengsel waar deeltjies almal in dieselfde fase is.  C (Oros & water) Indien ‘n leerder nie die gegewe voorbeelde D (Salt & water)  enige van mengsels gegee het nie, merk verkeerd (3) 2.2 2.2.1 Filtration / Filtrering  Heating – incorrect (1) 2.2.2 Evaporation / Verdamping  Verhitting - verkeerd (1) 2.3 Use a magnet to remove the iron filings from the sulphur powder. Iron is magnetic and sulphur is non-magnetic. The iron will be attracted to the magnet and the sulphur will not be attracted  Gebruik ʼn magneet om ystervylsels vanuit swawelpoeier te verwyder. Yster is magneties en swawel is nie-magneties. Die yster sal aangetrek word en die swawel nie (2) [10] QUESTION 3 / VRAAG 3 3.1 To investigate the heating curve of water  / Om die verhittingskurwe van water te ondersoek (2) 3.2 3.2.1 DE  (1) 3.2.2 BC  (1) 3.2.3 AB  (1) 3.3 3.3.1 * Constant increase in temperature  * Strong intermolecular forces of attraction  * Average kinetic energy is (very) low OR increasing as temperature increases OR average kinetic energy increase gradually  (3)  Konstante verhoging in temperatuur   Sterk intermolekulêre kragte teenwoordig   Gemiddelde kinetiese energie is (baie) laag OFverhoog soos temperatuur verhoog OF gemiddelde kinetiese enrgie verhoog stelselmatig  (3) 3.3.2. * Temperature increase constantly  * The intermolecular forces between the particles are extremely.  * As the temperature increases, the average kinetic energy of the molecules increases.  (3)  Temperatuur verhoog geredelik   Die intermolekulêre kragte tussen die deeltjies is swak en die deeltjies beweeg ver van mekaar   Soos die temperatuur verhoog, verhoog die gemiddelde kinetiese energie van die molekules  (3) 3

Downloaded from hlayiso.com MEMORANDUM Physical Sciences P2 / Fisiese Wetenskappe V2 3.4 [ANY PHASE – ANY 3] (3) Solid Liquid Gas  Definite shape  Definite volume  No definite volume  Definite volume  Changes shape  No definite shape  Resists forces that try to  Flows & takes shape of  Gases expand to fill container change volume & shape container  Big open spaces between  Small spaces between  Small spaces between particles particles particles  Particles move quickly.  Spaces between  Particles move in  Intense collisions occur particles are larger than orderly manner. between particles. expected due to  Collisions between  Movement is random. hydrogen bonding particles  Weak/no forces between (water).  Forces between particles  Orderly arrangement of particles particles  Particles only vibrate.  Very strong forces between particles [ENIGE FASE – ENIGE 3] Solied Vloeistof Gas  Definitiewe vorm  Definitiewe vorm  Geen definitiewe vorm  Definitiewe volume  Verander volume  Geen definitiewe volume  Weerstaan kragte wat  Vloei en neem vorm  Gasse sit uit om houer te vul volume en vorm wil van houer aan  Groot spasies tussen deeltjies verander  Klein spasies tussen  Deeltjies beweeg vinnig.  Klein spasies tussen deeltjies  Intense botsings tussen deeltjies  Deeltjies beweeg in deeltjies  Spasies tussen deeltjies ordelike wyse.  Vrye beweging. is groter as verwag a.g.v.  Botsings tussen  Swak / geen kragte tussen waterstofbinding (vir deeltjies deeltjies water).  Kragte tussen deeltjies  Ordelike rangskikking van deeltjies  Deeltjies vibreer slegs.  Baie sterk kragte tussen deeltjies [14] 4

Downloaded from hlayiso.com MEMORANDUM Physical Sciences P2 / Fisiese Wetenskappe V2 QUESTION 4 / VRAAG 4 4.1 4.1.1 NaCl crystals / NaCl kristalle  (2) 4.1.2 Copper metal / Kopermetaal  (2) 4.1.3 Plastic / Plastiek  (2) 4.1.4 Air (we breath) / Lug (wat ons inasem)  (2) 4.2 4.2.1 Carbon / Koolstof  (1) 4.2.2 Carbon has four (4) valence electrons; therefore can form four covalent bonds. In Not to be marked a diamond, each of the valence electrons forms covalent bonds with four other atoms of carbon.  There are no free electrons therefore no charge can flow.  (2) Moet nie gemerk word Koolstof het vier (4) valenselektrone, dus vorm dit vier kovalente bindings. In ʼn diamant, bind elke valenselektron met 4 koolstofatome.  Daarom is daar geen nie vry elektrone, dus vloei geen lading.  (2) 4.2.3 Graphite:  Carbon atoms covalently bonded to 3 other carbon atoms to form rings  Where electrons in rings become delocalised  and are free to move to conduct electrical current.  (4) Grafiet: ; Koolstofatome is kovalent gebind aan 3 ander atome om ringstrukture te maak  waar elektrone dan gedelokaliseerd is  en vry is om rond te beweeg en sodoende elektriese lading te gelei (4) [8] QUESTION 5 / VRAAG 5 5.1 5 (Five / Vyf)  (1) 5.2 3 (Three / Drie)  (1) 5.3 Pauli’s exclusion principle: Each orbital must have a maximum of 2 electrons and must spin in opposite directions. Hund’s rule: Orbitals of identical energy are available, electrons are placed in individual orbitals before they are paired. Pauli se uitsluitbeginsel  : Elke orbital het ʼn maksimum van 2 elektrone  en spin in teenoorgestelde rigtings Hund se reël : Orbitale met identiese energie is beskikbaar, die elektrone word in individuele orbitale geplaas, voordat dit afgepaar word  (6) 5.4 Oxygen / Suurstof  Accept: D (1) Aanvaar: D 5

Downloaded from hlayiso.com MEMORANDUM Physical Sciences P2 / Fisiese Wetenskappe V2 5.5 2p Negative marking Negatiewe merk    (3) 2s In opposite direction ( or  )  1s, 2s, 2p must be present 8 electrons / arrows in correct orbitals In teenoorgestelde rigting wees (  of ) 1s 1s, 2s, 2p moet teenwoordig wees 8 elektrone / pyltjies in korrekte orbitale  5.6 1s2 2s2 2p6 3s2 3p6 1s2  2s2 ;2p6 3s2; 3p6 correct number of electrons korrekte aantal elektrone (4) [16] QUESTION 6 / VRAAG 6 6.1 Neutrons / Neutrone  (1)   (88,48 x 20)  (0,27 x 21)  (11,25 x 22)  6.2   = Ar  100   Ar = 20,2277 OR / OF Ar = 20,23  (3) [4] 6

Downloaded from hlayiso.com MEMORANDUM Physical Sciences P2 / Fisiese Wetenskappe V2 QUESTION 7 / VRAAG 7 7.1 Colour change  Any 4 Forming a gas  Forming a solid OR precipitation  Change in temperature (release or absorption of heat)  A new substance is formed  The chemical nature of a substance is changed  A change in the potential energy of the substance  New properties  Kleurverandering  Enige 4 Vorming van ʼn gas  Vorming van ʼn solied OF presipitasie  Verandering in temperatuur (vrystel of absorpsie van hitte)  ‘n Nuwe substans / stof word gevorm  Die chemiese geaardheid van die stof word verander  ‘n Verandering in die potensiële energie van die substans  Nuwe eienskappe  (4) 7.2 Decomposition reaction is when a substance breaks up into at least two other substances.  A synthesis reaction is when at least two substances form a new substance.  Ontbindingsreaksie is waar ʼn stof opbreek in ten minste twee ander stowwe.  Sintese reaksie is waar ten minste twee stowwe saam ʼn nuwe stof vorm.  (4) 7.3 7.3.1 Physical Change  / Fisiese verandering  7.3.2 Chemical Change  / Chemiese verandering  7.3.3 Chemical Change  / Chemiese verandering  7.3.4 Physical Change  / Fisiese verandering  (4) [12] 7

Downloaded from hlayiso.com MEMORANDUM Physical Sciences P2 / Fisiese Wetenskappe V2 QUESTION 8 / VRAAG 8 8.1 8.1.1  (2) 8.1.2 [ Na] +  (1) H 8.1.3 x H x C xH x  (1) H 8.2 8.2.1 NH3  (1) 8.2.2 CO3-2  (1) 8.3 2NaHCO3  Na2CO3 + H2O + CO2  (2) Left balanced  Right balanced Links gebalanseerd Regs gebalanseerd 8.4 Ca(OH)2  + H2SO4  → CaSO4  + 2H2O (4) Equation balanced  Vergelyking gebalanseerd  8.5 8.5.1 Iron(III)chloride / Yster(III)chloried  (Accept: Ferric chloride) (2) 8.5.2 Potassium permangenate / Kaliumpermangenaat  (2) [16] 8