Extraction and uses of metals

Question 1

Identify the two methods for extracting metals from ores, and why each method would be used.

Answer 1

Electrolysis for metals more reactive than carbon.

Carbon Extraction for metals less reactive than carbon.

Question 2

What is an alloy?

Answer 2

A mixture of a metal and one or more elements, usually other metals or carbon.

Question 3

Explain a use for aluminium.

Answer 3

Aircraft bodies,
Low-density (light) and high strength.

Power cables,
Low-density (light) and conducts.

Question 4

Explain a use of copper.

Answer 4

Wires,
Excellent conductor of electricity.

Cooking pans,
Excellent conductor of heat.

Water pipes,
Unreactive and malleable.

Question 5

Explain a use of iron.

Answer 5

Making steel,

Steel is more useful than iron.

Question 6

Explain a use of low-carbon steel.

Answer 6

Ships, cars, bridges etc.,

Strong, but low-carbon so can be hammered into various shapes.

Question 7

Explain a use of high-carbon steel.

Answer 7

Toolse.g. knives, screwdrivers,

High-carbon so less malleable and stiffer than low-carbon steel.

Question 8

Explain a use of stainless steel.

Answer 8

Cutlery, cooking utensils, kitchen sinks,

Cr forms oxide layer that resists corrosion, so stays shiny and clean.