Do now!Can you stick the

summary and word sheets in?

Don’t forget we have a test on Friday

(topics 9e and 9f)

Last lesson

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

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

Today’s lessonUses of metals

Gold

Unreactive, malleable and a good conductor of electricity

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

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.

Steel (mainly iron)

Strong, fairly cheap.

Building

Copper

Ductile, unreactive and a good conductor

Copper

Ductile, unreactive and a good conductor

Saucepans, wires etc.

Let’s go for a walk!

Looking for uses of metals

Reading?!

Pages 84 and 85

Next topic?