Unit 6 - Metals and Metal Reactivity

7/28/2019 Unit 6 - Metals and Metal Reactivity

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d describe tests for oxidising and reducingagents (using aqueous potassium iodide,acidified potassium manganate(VII) andacidified potassium dichromate (VI)

reducer from full and ionic equations. They

need to be able to do this both in terms ofelectron transfer and oxidation number.

The common reactions and colour changesof oxidising and reducing agents can bedemonstrated. These are covered again inother syllabus areas (e.g. amount ofsubstance).

halogens from Unit 2 and

analyse them using ideasabout redox in terms ofelectron transfer.

9.3a

b,c

Extraction of metalsrelate the ease of obtaining metals fromtheir ores to the position of the metal inthe reactivity series

discuss the social, economic andenvironmental advantages anddisadvantages of recycling metals (e.g.aluminium and copper)

One approach is to ask different groups ofstudents to research the extraction ofdifferent metals e.g. name of metal

occurrence in nature (element orcompound?)how it is extracted from its ore (heatingwith carbon or electricity?)cost per tonne (this can be found usingan internet search engine for latestmetal prices)uses of the metalwhether or not the metal is usuallyrecycled.

This data can be displayed on fact cards orput into a table on board, spreadsheet ordatabase.The metals can then be considered in orderof reactivity to link trends in reactivity withthe method and energy of extraction. It isimportant that students recognise that theenergy demand of extraction determinesthe price of the metal, and that the use oflarge amounts of energy has implicationsfor recycling and the need to save fuelresources.

Percentage puritycalculations (Syllabuslearning outcome 3(k)) canbe taught here. Studentscan work out the percentageof metal compounds invarious ores.

www.chemsoc.org/networks/learnnet/classic_exp.htmLook at experiments 33, 74,94.

www.s-cool.co.uk/contents.aspclick on GCSE revision then

Chemistry then choosetopic: Extraction of Metals.Use the Quick learn section.

www.schoolscience.co.ukClick on: Chemistry 14-16then Copper mining andProperties and uses ofcopper

http://www.schoolchem.com/ex.htmwww.wpbschoolhouse.btinternet.co.uk/page10/page10.htmClick on Extraction of Metals
http://www.chemsoc.org/networks/learnnet/classic_exp.htmhttp://www.chemsoc.org/networks/learnnet/classic_exp.htmhttp://www.s-cool.co.uk/contents.asphttp://www.s-cool.co.uk/contents.asphttp://www.schoolscience.co.uk/http://www.schoolchem.com/ex.htmhttp://www.schoolchem.com/ex.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.schoolchem.com/ex.htmhttp://www.schoolchem.com/ex.htmhttp://www.schoolscience.co.uk/http://www.s-cool.co.uk/contents.asphttp://www.s-cool.co.uk/contents.asphttp://www.chemsoc.org/networks/learnnet/classic_exp.htmhttp://www.chemsoc.org/networks/learnnet/classic_exp.htm


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www.recycle-steel.org-

index2.htmlwww.nrcan.gc.ca/mms/scho-ecol/tour/intro-e.htmwww.nswmin.com.au/virtual-tours/cadia-hill/

9.4a

Irondescribe the extraction of iron in the blast

furnace

Students need to be familiar with an outlineschematic diagram of the blast furnace.

They need to know the raw materials,waste outputs (slag, carbon monoxide anddioxide) and equations for the oxidation ofcarbon, reduction of iron oxide andformation of slag.

The equations for thereactions in the Blast furnace

should be discussed in termsof redox (oxidation state andoxygen transfer).

www.chemsoc.org/networks/l

earnnet/classic_exp.htmLook at experiment 35.

www.bbc.co.uk/history/games/blast/blast.shtmlhttp://www.btinternet.com/~chemistry.diagrams/blastfurnace.htm

http://www.coruseducation.com/galleryironmaking.asp

b describe the composition, properties anduses of some examples of steel particularly mild steel (car bodies,machinery) and stainless steel (chemicalplant, cutlery, surgical instruments).

Students can carry out a steel surveyusing a magnet to identify where iron andsteel are used in the materials aroundthem. Examples include food and drinkscans, vehicles, paper clips.

For each use students should be able tooutline which properties of steel are mostimportant in its choice.

This is an opportunity toreinforce ideas about alloys.Students can research to findout which elements areadded to make different

types of steel e.g. mild steel,stainless steel, high tensilesteel.

www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmClick on Extra Industrial

Chemistry

http://www.coruseducation.com/wordsearch/index2.htmlFor a list of online resourcesrelating to the steel industrygo tohttp://www.coruseducation.co

m/internet.asp
http://www.recycle-steel.org-index2.html/http://www.recycle-steel.org-index2.html/http://www.nrcan.gc.ca/mms/scho-ecol/tour/intro-e.htmhttp://www.nrcan.gc.ca/mms/scho-ecol/tour/intro-e.htmhttp://www.nswmin.com.au/virtual-tours/cadia-hill/http://www.nswmin.com.au/virtual-tours/cadia-hill/http://www.chemsoc.org/networks/learnnet/classic_exp.htmhttp://www.chemsoc.org/networks/learnnet/classic_exp.htmhttp://www.bbc.co.uk/history/games/blast/blast.shtmlhttp://www.bbc.co.uk/history/games/blast/blast.shtmlhttp://www.btinternet.com/~chemistry.diagrams/blastfurnace.htmhttp://www.btinternet.com/~chemistry.diagrams/blastfurnace.htmhttp://www.btinternet.com/~chemistry.diagrams/blastfurnace.htmhttp://www.coruseducation.com/galleryironmaking.asphttp://www.coruseducation.com/galleryironmaking.asphttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.coruseducation.com/wordsearch/index2.htmlhttp://www.coruseducation.com/wordsearch/index2.htmlhttp://www.coruseducation.com/internet.asphttp://www.coruseducation.com/internet.asphttp://www.coruseducation.com/internet.asphttp://www.coruseducation.com/internet.asphttp://www.coruseducation.com/wordsearch/index2.htmlhttp://www.coruseducation.com/wordsearch/index2.htmlhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.wpbschoolhouse.btinternet.co.uk/page10/page10.htmhttp://www.coruseducation.com/galleryironmaking.asphttp://www.coruseducation.com/galleryironmaking.asphttp://www.btinternet.com/~chemistry.diagrams/blastfurnace.htmhttp://www.btinternet.com/~chemistry.diagrams/blastfurnace.htmhttp://www.btinternet.com/~chemistry.diagrams/blastfurnace.htmhttp://www.bbc.co.uk/history/games/blast/blast.shtmlhttp://www.bbc.co.uk/history/games/blast/blast.shtmlhttp://www.chemsoc.org/networks/learnnet/classic_exp.htmhttp://www.chemsoc.org/networks/learnnet/classic_exp.htmhttp://www.nswmin.com.au/virtual-tours/cadia-hill/http://www.nswmin.com.au/virtual-tours/cadia-hill/http://www.nrcan.gc.ca/mms/scho-ecol/tour/intro-e.htmhttp://www.nrcan.gc.ca/mms/scho-ecol/tour/intro-e.htmhttp://www.recycle-steel.org-index2.html/http://www.recycle-steel.org-index2.html/


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www.schoolscience.co.ukClick on: Steel for manypurposesOr click Chemistry 14-16then The chemistry ofsteelmaking

d,e describe how iron rusts and methods ofrust prevention, including sacrificialprotection

Test tube reactions using nails can be setup to show that air and water are neededfor rusting to take place. Students can

investigate different methods of rustprevention e.g. coating the nails with oil,grease or paint, using copper or zinc foil,investigating the effect of acid and salt onrate of rusting.

Another activity is to bring a bicycle into theclassroom. Students look to find out howthe different parts of the bicycle are

protected from rusting. They can considerwhy different methods of rust preventionare used for different areas.

Contrast the rusting of iron tothe formation of a protectiveoxide layer on aluminium

(Syllabus learning objective9.5 (b))

Students should recogniserusting as an oxidationreaction.

Contexts to use fordiscussion include the use of

zinc and magnesium blocksto protect oil rigs and shipsand the sealing of carundercarriages with plasticsealants.

www.chemsoc.org/networks/learnnet/classic_exp.htm

Look at experiments 50, 55,69.

http://www.coruseducation.com/RailWebRun/index1.html
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Unit 6 - Metals and Metal Reactivity