Extraction of metals

• Chemistry
• Secondary Education
• Age 12,13

Extraction of metals

Topic 6. Metals 

21 February 2024

Our Learning Map

Our Learning Map

analyse a video about the complete extraction process of iron from hematite in the blast furnace

Our Learning Map

analyse a video about the complete extraction process of iron from hematite in the blast furnace

sort out cards showing the steps in extracting iron from hematite

Our Learning Map

analyse a video about the complete extraction process of iron from hematite in the blast furnace

examine the importance of slag formation in the extraction process 

sort out cards showing the steps in extracting iron from hematite

Our Learning Map

State the conditions required for the rusting of iron and steel to form hydrated iron(III) oxide

State some common barrier methods, including painting, greasing and coating with plastic

Describe how barrier methods prevent rusting by excluding oxygen or water

- State the symbol equations for the extraction of iron from hematite

(a) C + O₂ → CO₂

(b) C + CO₂ → 2CO

(c) Fe₂O₃ + 3CO → 2Fe + 3CO₂

(d) CaCO₃ → CaO + CO₂ 

(e) CaO + SiO₂ → CaSiO₃

Metal Extraction and Reactivity

Topic 6. Metals 

21 February 2024

Collaborative Work 5C/E - "Extract Sort"

• Goal - Classify a list of metals based on their reactivity and predict the extraction methods required for each.
• Product/Output - List of metals
• Standards - Correct list.

• Sodium
• Platinum
• Gold
• Magnesium
• Iron
• Copper
• Zinc

Useful information

• Metals above carbon = Electrolysis
• Metals between hydrogen and carbon = Burning with carbon
• Metals below hydrogen but above silver = Burning directly in the air
• Metals from silver and below = No extraction needed

(Hydrogen)

Plenary session

• What have you learned from the sorting activity?

Metal Extraction and Reactivity

Topic 6. Metals 

21 February 2024

secondaryscience4all.wordpress.com

What do you call this rock or mineral ore?

Questions to think about while watching the video.

a. What do you call the ore from which iron can be extracted?

b. How is iron extracted from its ore?

Collaborative work 6C/E - Blooket Game

• Goal - Answer the questions related to the video watched. Win the game and get 2 extra credits.
• Product/Output - Blooket scores.
• Standards - Correct responses and quick response.

play.blooket.com

Plenary session

Extraction of iron from hematite

• Coke burns in the hot air, forming carbon dioxide. The reaction is exothermic, giving off heat and heating the furnace.
•  At the high temperatures in the furnace, more coke reacts with carbon dioxide, forming carbon monoxide. Carbon dioxide has been reduced to carbon monoxide.
•  Carbon monoxide reduces the iron(III) oxide in the iron ore to form iron. This will melt and collect at the bottom of the furnace, where it is tapped off.  
• Limestone (calcium carbonate) is added to the furnace to remove impurities in the ore. The calcium carbonate in the limestone thermally decomposes to form calcium oxide. 
• The calcium oxide formed reacts with the silicon dioxide, an impurity in the iron ore, to form calcium silicate. This melts and collects as a molten slag floating on the molten iron tapped off separately. 

Classwork 6 - Extraction of iron

• Goal - Write the three raw materials added to the top of the blast furnace. Sequence (arrange) the steps in extracting iron from hematite by numbering them correctly.
• Product/Output - Classwork 6 paper.
• Standards - Correct responses.

Plenary session

• What have you learned from classwork 6?

Metal Extraction and Reactivity

Topic 6. Metals 

21 February 2024

Lesson Key Points

• The position of metals in the reactivity series affects the ease of obtaining them from their ores.
• Metals higher in the reactivity series are more reactive and require more energy to extract.
• Metals lower in the reactivity series are less reactive and can be obtained using simpler extraction methods.
• Importance of Coke in providing heat and producing carbon dioxide
• Conversion of carbon dioxide to carbon monoxide
• Role of carbon monoxide in reducing iron(III) oxide
• Thermal decomposition of calcium carbonate to produce calcium oxide
• Significance of slag formation