Metals

Worked examples (12)extended set

• 1Metal or non-metal? Classifying elements from data
• 2Zinc with dilute sulfuric acid
• 3Metallic bonding explains conductivity and malleability
• 4Magnesium and steam
• 5Collecting the hydrogen from calcium and water
• 6Why aluminium seems unreactive at first (multiple choice)
• 7Burning magnesium in a crucible: percentage yield
• 8Ranking metals by the temperature rise with acid
• 9Planning a fair comparison of two metals with acid
• 10Oxides of a metal and a non-metal
• 11Identifying a metal from the hydrogen it releases
• 12Magnesium with cold water and with steam

Model answers (6)

• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) structured style

Worked examples (12)extended set

• 1Choosing an extraction method from the reactivity series
• 2Labelling the blast furnace
• 3The five blast-furnace equations
• 4Redox in the blast furnace (multiple choice)
• 5Electrolysis cell for aluminium
• 6Statements about aluminium extraction (multiple choice)
• 7Mass of iron from an ore and percentage yield
• 8Extracting vanadium using aluminium
• 9Planning a laboratory extraction of copper from its ore
• 10When metals were first obtained
• 11Electrons, aluminium and burnt anodes
• 12How much limestone? Removing silica as slag

Model answers (6)

• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) extended-response style

Worked examples (12)extended set

• 1Potassium and calcium with cold water
• 2Identifying metals from bubbling in acid
• 3Deducing an order from a displacement table
• 4What a displacement result tells you (multiple choice)
• 5Zinc in iron(II) sulfate, silver in zinc nitrate
• 6Temperature rise in displacement reactions
• 7Magnesium and steam
• 8Why aluminium starts slowly
• 9Placing four unknown metals in order
• 10Predicting the reactions of manganese
• 11Mass change of a zinc strip in silver nitrate
• 12Aluminium displacing copper

Model answers (6)

• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) structured style

Worked examples (12)extended set

• 1Properties behind the uses of aluminium and copper
• 2Alloys: definition, brass and stainless steel
• 3Which diagram shows an alloy?
• 4Why alloys are harder: sliding layers
• 5Statements about alloys (multiple choice)
• 6Overhead cables: aluminium around a steel core
• 7Aluminium food trays and acidic food
• 8Choosing a metal from a data table
• 9Comparing the hardness of copper and brass
• 10How much chromium is in a stainless steel spoon?
• 11Finding the percentage of zinc in brass
• 12Hardness of copper–zinc alloys from a graph

Model answers (6)

• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) extended-response style

Worked examples (12)extended set

• 1Matching a barrier method to the object
• 2Four test tubes: which nails rust?
• 3Measuring the oxygen used by rusting iron wool
• 4Why galvanised steel survives a scratch (multiple choice)
• 5Zinc blocks on a steel pier
• 6Scratched zinc coating versus scratched tin coating
• 7Nails wrapped with other metals
• 8Does salt speed up rusting? Reading the graph
• 9Barrier or sacrificial? (multiple choice)
• 10Corrosion next to a brass propeller
• 11Water of crystallisation in rust
• 12Magnesium or zinc for sacrificial blocks?

Model answers (6)

• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 6 (Alternative to Practical) style