Metals And Ores

Question 0

What is an ore?

Answer 0

A substance that is found on the earth’s crust, containing metal atoms and other elements.
Example- bauxite (aluminium)

Question 1

From the most reactive to the least reactive, state the reactivity series

Answer 1

Potassium, sodium, calcium, magnesium, aluminium, zinc, iron, tin, lead, copper, silver, gold

Question 2

How can metals be extracted by their ores?

Answer 2

By chemical reactions or electrolysis

Question 3

What unreactive metals can be found uncombined with other elements?

Answer 3

Silver, gold and platinum

Question 4

What are the difficulties when extracting metals from their ores?

Answer 4

The amount of energy increases, as their reactivity increases

Question 5

What is true about displacement in the reactivity series?

Answer 5

Any metal can displace a metal lower than it in the reactivity series from a solution of salts

Question 6

What is reduction?

Answer 6

It involves the removal of oxygen atoms from a chemical

Question 7

What is oxidation?

Answer 7

Involves the addition of oxygen atoms to a chemical

Question 8

How is iron extracted?

Answer 8

In a blast furnace. It involves both reduction and oxidation. The iron oxide ore is reduced to iron at a high temperature

Question 9

How is aluminium extracted?

Answer 9

electrolysis. It involves more energy than a blast furnace. heated to high temperatures making it melt. positively charged ions move towards the cathode and negatively charged atoms move towards the anode

Question 10

What are the sustainability issues with the extraction of metals from their ores?

Answer 10

• the location of the plant will have an environmental impact because of large land use and contamination of land. And will have an effect on the local population
• fuel and energy costs
• greenhouse gas emissions
• impact of recycling