Extracting metals
Alkaline Earth metals
Know that Group 2 are the Alkaline Earth metals
Know the electron configurations for Be, Mg and Ca
Explain the trends in atomic radius, ionisation energy and reactivity down Group 2,
related to shielding, atomic radius and nuclear charge
Describe the trend in melting points down Group 2 (CARE: Magnesium)
Write equations for the reactions of Group 2 elements with water to form a
State the trend in vigour of reaction of Group 2 with water
State solubility trends for Group 2 hydroxides and sulfates
Explain the trend in pH of the solution produced by a Group 2 hydroxide linked
to solubility
Describe a test for sulphate ions linked to solubility
Identify what has been oxidised and reduced in the above reactions
Discuss some uses of Group 2 compounds
Understand the term ‘ore’ and relate the method of metal extraction to it’s reactivity
Describe how to extract a metal from a sulphide ore
Discuss the pro’s and con’s of oxidising sulfides
Write equations for the reduction of iron (III) oxide and manganese (IV) oxide with
carbon and carbon monoxide
Write equations for the reduction of copper carbonate and copper oxide with carbon,
and the thermal decomposition of copper carbonate
Write an equation for reducing Tungsten oxide with hydrogen
Discuss why carbon is not used to extract tungsten and some issues surrounding the
use of hydrogen in this process
Describe how aluminium is extracted in an electrolysis pot
Discuss the economics of aluminium extraction linked to electricity, cryolite and
graphite anodes
Write symbol, ionic and half-equations for aluminium oxide electrolysis
Discuss the properties of titanium
Describe the three stages of extracting titanium from titanium (IV) oxide
Write equations for the three stages discussed above
Discuss the advantages and disadvantages of recycling metals
Explain the role of scrap ion in copper extraction from low grade ores
Exam ques
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AS Chemistry – Unit 2