9.4, 9.5 Uses of Metals, Extraction of Metals

Metal	Property	Use
Aluminium, Al	Low d__	A__
	Resistant to c__	F__ containers
	Low density, good electrical conductor	Overhead electrical c__

density, aircraft, corrosion, food, cable

Metal	Property	Use
Copper, Cu	Good electrical c__, ductile	Electrical w__
	Good h__ conductivity	P__ & pans

conductor, wires, heat, pots

Metal	Property	Use
Zinc, Zn	Higher than Fe in reactivity	G__

galvanising

Mild steel is made up of mostly F__, some C
USE: machinery

fe

Stainless steel is made up of mostly F__; Cr, Ni
USE: c__

fe, cutlery

Extraction

Metal	Method
K Na Ca Mg Al	E__
Zn	Reduction of sulfide by O2
Fe	B__ furnace (reduced by CO)
Pb	Reduction by __ (think abt reactivity)
Cu	Reduction by __ (think abt reactivity)
Ag	Natural state

electrolysis, blast, C, H

Which zone has the highest temp?

1

Extraction of Iron (Blast Furnace)
1. Feed iron ore (h__), c__, l__ into furnace
2. H__ air reacts w/ c__:
> C + O₂ → __

hematite, coke, limestone, hot, coke, co2

Extraction of Iron (Blast Furnace)
3. Add more coke:
> CO₂ + __ → 2CO
> The “2CO” is the r__ agent

C, reducing

Extraction of Iron (Blast Furnace)
4. Reduce (extract) iron from its ore:
Fe₂O₃ + 3__ → 2Fe + 3CO₂

CO

Extraction of Iron (Blast Furnace)
5. Decompose l__ w/ heat:
> CaCO₃ → CaO + CO₂
CaO w/ impurites form s__:
> CaO + SiO₂ → CaSiO₃

6. iron tapped

limestone, slag

Is the iron output liquid or solid?

liquid

Limestone is added to:
> make C__
> remove S__ (impurities) from the furnace

co2, sio2