Unit 3- Metal Ores Flashcards
Name 3 less reactive metals
Gold
Silver
Copper
What are metal ores?
Naturally occurring compounds of metals
What metals are found uncombined in the earths crust?
Less reactive metals
Which metals have to be extracted from their ores?
More reactive metals
How are some less reactive metals obtained from their ores?
By heat alone
Some other metal oxides need more than heat, what else do they need to be extracted from their ores?
They can be ham eared with substances such as carbon and carbon monoxide
How are the more reactive metals obtained?
By electrolysis
What is the name for aluminium oxide?
Bauxite
How is iron extracted from its ore?
By using a blast furnace
What is added to the blast furnace?
Iron ore
Coke
Limestone
Why is limestone added to a blast furnace?
To remove impurities from the product
Where is hot air blasted into a blast furnace?
At the bottom of the furnace
What happens to the coke inside the blast furnace?
The coke reacts with the oxygen from the air to produce carbon dioxide
What happen after carbon dioxide is create in a blast furnace?
Further up the furnace the hot carbon dioxide combines with more carbon to produce carbon monoxide
What is the role of carbon monoxide in the blast furnace?
It acts as a reducing agent which reduces the iron oxide to iron
