1 of 16

Lesson 4 - Extracting metals practical

Mineral Ore Native Extraction Displacement Electrolysis

​

2 of 16

If you can’t do practical in class, plan the practical and show video

  • Start
    • Stick in practical sheet
    • Read practical sheet and complete risk assessment
  • Main
    • Justify the extraction method
    • Carry out practical in pairs
    • Answer practical summary questions
  • Plenary
    • Compete worksheet

Mineral Ore Native Extraction Displacement Electrolysis

​

3 of 16

Practical / Demo - insert title here

Safety

  • Googles, long hair tied up, lab coats
  • Well ventilated (be aware of asthmatics)

Aim

  • Explore method of using carbon to extract metals

Top tips

  • Carbon and copper oxide powder will go everywhere, so lab coats and make time to clean the tables.
  • Use tongs to handle crucible (very hot).
  • When pouring products into cold water to see copper, be careful of black powder going everywhere, well ventilated room.

​

​

​

Method

  1. Put heaped spatula of copper oxide powder into a metal crucible

​

  • Add heaped spatula of carbon powder and mix well.

​

  • Heat the mixture strongly on a blue Bunsen flame until it glows.

​

  • Pour the hot mixture into a beaker of cold water – some may be stuck to the bottom of the crucible – scrape this out.

​

  • Leave for two minutes then pour off the dirty water.

​

  • Keep adding cold water to the mixture and pouring off the dirty water until you see pink copper at the bottom of the beaker.

Mineral Ore Native Extraction Displacement Electrolysis

​

4 of 16

Extracting metals practical

  1. Give two properties of metals.
  2. Give two properties of nonmetals.
  3. Define a displacement reaction.
  4. Give the definition for an ore.
  5. Complete the following reactions:

Iron oxide + Sodium

Potassium oxide + hydrogen

Lead oxide + carbon

Mineral Ore Native Extraction Displacement Electrolysis

​

5 of 16

Lesson 4 (practical) - Extracting metals

Stick in practical sheet.

Read the instructions for the practical in silence.

Copy and complete the risk assessment using the table below. (At least 3 risks assessed).

Hazard?

What is the risk?

What can I do to keep myself and others safe and why?

​

​

​

​

​

​

​

​

​

Hazard?

What is the risk?

What can I do to keep myself and others safe and why?

​

​

​

​

​

​

​

​

​

Mineral Ore Native Extraction Displacement Electrolysis

​

6 of 16

Hazard?

What is the risk?

What can I do to keep myself and others safe and why?

Bunsen burner-Fire

Burns

Safety flame, when not in use

Use tongs to handle crucibles

Copper oxide powder- causes serious eye damage; skin irritant; harmful if swallowed/inhaled; toxic to aquatic life

Corrosive, irritant, environmental hazard

Tell teacher straight away if spilled, use a pipette carefully to avoid spillages, wear goggles

Carbon and Copper oxide Powder

Breathing issues (asthmatics)

Avoid raising dust (especially when adding to water), fully ventilated room

Broken glass

Cuts

Tell teacher straight away if broken glass

Mineral Ore Native Extraction Displacement Electrolysis

​

7 of 16

Lesson 4 (practical) - Extracting metals

​

Learning Objectives

  • Justify the choice of extraction method for a metal, given data about reactivity
  • Suggest factors to take into account when deciding whether extraction of a metal is practical.

Mineral Ore Native Extraction Displacement Electrolysis

​

8 of 16

Mineral Ore Native Extraction Displacement Electrolysis

​

9 of 16

Instructions

​

  1. Put 1 heaped spatula of copper oxide powder into a metal crucible

​

  • Add 1 heaped spatula of carbon powder and mix well.

​

  • Heat the mixture strongly on a blue Bunsen flame until it glows.

​

  • Pour the hot mixture into a beaker of cold water – some may be stuck to the bottom of the crucible – scrape this out.

​

  • Leave for two minutes then pour off the dirty water.

​

  • Keep adding cold water to the mixture and pouring off the dirty water until you see pink copper at the bottom of the beaker.

​

​

Mineral Ore Native Extraction Displacement Electrolysis

​

10 of 16

Extracting Copper from copper oxide.

Justify the instructions method of extracting copper. �What factors needed to be considered?

Copper is less reactive than Carbon, so we can use carbon to displace copper from its oxide, resulting in copper and carbon dioxide.

Mineral Ore Native Extraction Displacement Electrolysis

​

11 of 16

Mineral Ore Native Extraction Displacement Electrolysis

​

12 of 16

Blue Flame

Use tongs to handle crucible

Add spatula of carbon

C

Add spatula of copper oxide

Beaker of Cold water

Pour products into water

Copper

Mix well

Mineral Ore Native Extraction Displacement Electrolysis

​

13 of 16

Summary

  1. What did you make?
  2. Explain this reaction using the reactivity series
  3. Write a word equation
  4. Challenge: Write a balanced symbol equation
  5. Why could you not use this method to extract aluminium from aluminium oxide?

Mineral Ore Native Extraction Displacement Electrolysis

​

14 of 16

  • What did you make?�Copper and Carbon dioxide�
  • Explain this reaction using the reactivity series�Carbon displaced copper because carbon is more reactive than copper�
  • Write a word equation�Copper oxide + carbon → Copper + carbon dioxide�
  • Challenge: Write a balanced symbol equation�2CuO + C → 2Cu + CO2�
  • Why could you not use this method to extract aluminium from aluminium oxide?�Because aluminium is more reactive than carbon, you would have to use electrolysis

Mineral Ore Native Extraction Displacement Electrolysis

​

15 of 16

Complete the worksheet

Mineral Ore Native Extraction Displacement Electrolysis

​

16 of 16

Logos / symbols

Mineral Ore Native Extraction Displacement Electrolysis

​