Lesson 10 uses of metals and extraction

Do now!

Why do you think I’ve put carbon in

the series??

Last lesson

• Displacement reactions of ions in solution

Displacement reactions

zinc magnesium copper lead

Zinc sulphate X X XMagnesium sulphate X X X XCopper sulphate XLead nitrate X X

A more reactive metal will displace a less reactive metal from solution

Iron(s) + silver nitrate(aq) silver(s) + iron nitrate(aq)

Can you copy carefully please?

Today’s lesson

• Extraction of metals from their ores related to the reactivity series

• Uses and properties of metals

Ores

Most metals are found naturally in rocks called ores. They are in compounds, chemically bonded to other elements

iron ore

Native

Some unreactive metals can be found as elements. They are called native metals.

Roasting

Some unreactive metals can be extracted from a compound simply by heating. This is called roasting.

More reactive metals?

• Zinc, iron, tin, lead

Extracting metals with carbon

Carbon is higher than some metals in the reactivity series. It can be used to extract medium reactive metals.

Extracting metals with carbon

lead oxide + carbon lead + carbon dioxide

2PbO(s) + C(s) 2Pb(s) + CO2(g)

Extracting metals with carbon

lead oxide + carbon lead + carbon dioxide

2PbO(s) + C(s) 2Pb(s) + CO2(g)

carbon is oxidised

lead oxide is reduced

The Blast furnace

1000°C

1500°C

1900°C

Iron ore (haematite), coke (carbon) and limestone (calcium carbonate)

Hot waste gases (recycled to heat furnace)

Blasts of hot airBlasts of hot air

Molten iron

YouTube - Steelmaking: Blast Furnace

More reactive metals?

Electrolysis of aluminium oxide

CO2

Let’s extract a metal!

Carbon + copper oxide copper + carbon dioxide

Let’s extract a metal!

TEST next Friday 9th October on the “metals” topic

(everything we have done so far except Space and gravity)

Uses of metals

Gold

Unreactive, malleable and a good conductor of electricity

Jewelry, wires in computers, gold leaf

Aluminium

Light, and a very unreactive oxide layer forms over the reactive metal means it does not corrode

Aircraft, cars, cutlery etc.

Steel (mainly iron)

Strong, fairly cheap.

Building

Copper

Ductile, unreactive and a good conductor

Saucepans, wires etc.

Let’s go for a walk!

Looking for uses of metals