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© Mana Tohu Mātauranga o Aotearoa, 2017. Pūmau te mana. Kia kaua rawa he wāhi o tēnei tuhinga e whakahuatia ki te kore te whakaaetanga tuatahi a te Mana Tohu Mātauranga o Aotearoa.

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Te Mātauranga Matū, Kaupae 1, 201790933M Te whakaatu māramatanga ki ngā āhuatanga o ētahi pūmotu

9.30 i te ata Rātū 14 Whiringa-ā-rangi 2017 Whiwhinga: Whā

Paetae Kaiaka KairangiTe whakaatu māramatanga ki ngā āhuatanga o ētahi pūmotu.

Te whakaatu māramatanga hōhonu ki ngā āhuatanga o ētahi pūmotu.

Te whakaatu māramatanga matawhānui ki ngā āhuatanga o ētahi pūmotu.

Tirohia mēnā e rite ana te Tau Ākonga ā-Motu (NSN) kei runga i tō puka whakauru ki te tau kei runga i tēnei whārangi.

Me whakamātau koe i ngā tūmahi KATOA kei roto i tēnei pukapuka.

He taka pūmotu me ētahi atu rauemi tautoko kei te Pukapuka Rauemi L1–CHEMMR.

Mēnā ka hiahia whārangi atu anō mō ō tuhinga, whakamahia ngā whārangi wātea kei muri o tēnei pukapuka, ka āta tohu ai i ngā tau tūmahi.

Tirohia mēnā e tika ana te raupapatanga o ngā whārangi 2 – 19 kei roto i tēnei pukapuka, ka mutu, kāore tētahi o aua whārangi i te takoto kau.

HOATU TE PUKAPUKA NEI KI TE KAIWHAKAHAERE HEI TE MUTUNGA O TE WHAKAMĀTAUTAU.

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TŪMAHI TUATAHI

(a) Tātuhiatewhakanahatangairahikomōiangotakonumohemetengotapungatarakitetapawhāiraro.

Kataeaekoetekōreromōtetakapūmotukeitepukapukarauemi.

Ngota konumohe Ngota pungatara

(b) Hererekēngāwhanahikootekatotekonumohemetekatotepungatara.

Whakamāramahiaheahaipēneiai.

Itōtuhinga,me:

• whakaurutewhakanahatangairahikomōngākatoteerua

• whakahāngaingāwhanaongākatotekitetūngaongāngotakitetakapūmotu.

Katote konumohe Katote pungatara

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QUESTION ONE

(a) Drawtheelectronarrangementforeachoftheatomsaluminiumandsulfurintheboxesbelow.

Youmayrefertotheperiodictableintheresourcebooklet.

Aluminium atom Sulfur atom

(b) Aluminiumionsandsulfideionshavedifferentcharges.

Explainwhythisoccurs.

Inyouranswer,youshould:

• includetheelectronarrangementforbothions

• relatethechargesoftheionstothepositionoftheatomsontheperiodictable.

Aluminium ion Sulfide ion

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(c) HekonganukuRōpū2tekonupūmāmetekonupora.

Whakatauriteangātauhohengamatūoēneikonganukueruainamotuhaketetauhohekitewaimetewaikawapūhaumāotawaimeha.

Itōtuhingamewhakaurukoe:

• ngākitengakaputainatauhoheaiakonganukukitewai

• ngākitengakaputainatauhoheaiakonganukukitewaikawapūhaumāotawaimeha

• ngāwhāritetohutauritemōtetauhoheotekonupūmākitewaimetewaikawapūhaumāotawaimeha.

Tewhāritetohutauritemōtetauhoheotekonupūmākitewai:

Tewhāritetohutauritemōtetauhoheotekonupūmākitewaikawapūhaumāotawaimeha:

He wāhi anō mō tō tuhinga mō tēnei tūmahi kei te whārangi 6.

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(c) CalciumandmagnesiumarebothGroup2metals.

Compareandcontrastthechemicalreactionsofthesetwometalswhenreactedseparatelywithwateranddilutehydrochloricacid.

Inyouranswer,youshouldinclude:

• observationsthatwouldbemadewheneachmetalreactswithwater

• observationsthatwouldbemadewheneachmetalreactswithdilutehydrochloricacid

• balancedsymbolequationsforcalciumreactingwithwateranddilutehydrochloricacid.

Balancedsymbolequationforcalciumreactingwithwater:

Balancedsymbolequationforcalciumreactingwithdilutehydrochloricacid:

There is more space for your answer to this question on page 7.

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7

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TŪMAHI TUARUA

(a) TuhiakiaRUAngāāhuatangaōkikomōtēnāmōtēnāongāpūmotupungatarametekonumatā.

(b) Katāpirihiangāporakakonuteakingātakereongākaipukematai(rino)iētahiwā,eaikitehoahoairaro.

konutearino

i hangaia te takere ki te maitai (ko te rino te nuinga)

mata o te moana

Ngā poraka konutea kua whakamaua ki te takere o tētahi kaipuke

Hemeaurutaui:http://demo.shuledirect.co.tz/notes/view_notes/y02Lp9A41tPKV-TIdE49kA/VFVU1c54ULfgMQQgLpxqZQ/AWyJ1HpuURzJiH-csFGUUA

Whakamāramahiamaiheahaimahiaaiēneiporakamaiitekonutea,ā,heahaiwhakamauaaikitetakerekaipuke.

Ka taea e koe te kōrero mō te raupapatanga hohe kei tō pukapuka rauemi.

8

QUESTION TWO

(a) GiveTWOphysicalpropertiesforeachoftheelementssulfurandlead.

(b) Zincblocksaresometimesaddedtothehullsofsteel(iron)ships,asshowninthediagrambelow.

zinciron

ship’s hull made of steel (mainly iron)

sea surface

Blocks of zinc attached to the hull of a ship

Adaptedfrom:http://demo.shuledirect.co.tz/notes/view_notes/y02Lp9A41tPKV-TIdE49kA/VFVU1c54ULfgMQQgLpxqZQ/AWyJ1HpuURzJiH-csFGUUA

Explainwhytheseblocksaremadefromzincandwhytheyareusedonthehullofaship.

You may refer to the activity series in the resource booklet.

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(c) Hewhānaukoranutezamak,ā,kotekonuteatekonganukutaketakemengāpūmotukoranuotekonumohe,konuporametekonukura.

(i) Whakamāramahiamaiheahaiwhakamahiaaitekoranuiētahiwākauakongākonganukuurutapu.

(ii) Kataeatezamaktewhakamahiheihangarei.

Whakamāramahiawhānuitiangāhuapaiotetāpiriingāpūmotukonumohe,konuporametekonukurakitekonuteaheihangaitekoranuzamak.

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(c) Zamak isafamilyofalloyswithabasemetalofzinc,andwithalloyingelementsofaluminium,magnesium,andcopper.

(i) Explainwhyalloysaresometimesusedinsteadofpuremetals.

(ii) Zamakcanbeusedtomakejewellery.

Elaborateontheadvantagesofaddingtheelementsaluminium,magnesium,andcoppertozinctomakethealloyzamak.

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TŪMAHI TUATORU

(a) WhakaahuahiangāāhuatangaeRUAotehaukini.

(b) Inatāpirihiahewaikawapungatarakukūkitekonukura(II)pākawapungataraiti,kahuritetaemaiitekikorangikitepūmā.

tioata kikorangi paura

pūmā

CuSO4.5H2O(s) →CuSO4(s)+5H2O()

Whakamāramahiamaitemahiatewaikawapungatarakukūirotoitēneitauhohenga,kātahikatūhonokoeingākitengakingāmomokeiroto.

Me kōrero koe mō ngā hoahoa me te whārite kei runga.

12

QUESTION THREE

(a) DescribeTWOpropertiesofammonia.

(b) Whenconcentratedsulfuricacidisaddedtoasmallamountofcopper(II)sulfate,thecolourchangesfrombluetogrey-white.

blue crystals

grey-white powder

CuSO4.5H2O(s) →CuSO4(s)+5H2O()

Explaintheroleoftheconcentratedsulfuricacidinthisreaction,linkingtheobservationstothespeciesinvolved.

You should refer to the diagrams and the equation given above.

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(c) Kataeatehaumāotametehāora-torutewhakamahiheipatuhuakitairotowai.

Whakatauriteatewhakamahingaoēneimatūeruamōtepatuhuakitairotowai.

Itōtuhingamewhakaurukoe:

• ngāāhuatangaōkiko,matūhoki/rāneimōiamatū

• ngāhuapaimengāhuakinootewhakamahiiiamatūheipatuhuakitairotowai.

• ngāwhāritetohutauriteehāngaiana.

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(c) Chlorineandozonecanbothbeusedtodisinfectwater.

Compareandcontrasttheuseofthesetwosubstancesfordisinfectingwater.

Inyouranswer,youshouldinclude:

• physicaland/orchemicalpropertiesforeachsubstance

• advantagesanddisadvantagesofusingeachofthesubstancestodisinfectwater

• relevantbalancedsymbolequations.

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He whārangi anō ki te hiahiatia.Tuhia te (ngā) tau tūmahi mēnā e tika ana.

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Chemistry 90933, 2017

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QUESTION NUMBER

Extra paper if required.Write the question number(s) if applicable.

Te Mātauranga Matū 90933M, 2017

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ANAKETAU TŪMAHI

He whārangi anō ki te hiahiatia.Tuhia te (ngā) tau tūmahi mēnā e tika ana.

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Extra paper if required.Write the question number(s) if applicable.

90

93

3M

Level 1 Chemistry, 201790933 Demonstrate understanding

of aspects of selected elements

9.30 a.m. Tuesday 14 November 2017 Credits: Four

Achievement Achievement with Merit Achievement with ExcellenceDemonstrate understanding of aspects of selected elements.

Demonstrate in-depth understanding of aspects of selected elements.

Demonstrate comprehensive understanding of aspects of selected elements.

Check that the National Student Number (NSN) on your admission slip is the same as the number at the top of this page.

You should attempt ALL the questions in this booklet.

A periodic table and other reference material are provided in the Resource Booklet L1–CHEMR.

If you need more room for any answer, use the extra space provided at the back of this booklet and clearly number the question.

Check that this booklet has pages 2 – 19 in the correct order and that none of these pages is blank.

YOU MUST HAND THIS BOOKLET TO THE SUPERVISOR AT THE END OF THE EXAMINATION.

English translation of the wording on the front cover