Ores, Oxidation and Reduction (paper1) Flashcards
What is an ore
A rock containing ionic metal compounds
How do we extract iron from an ore
We react the ore with carbon
Why do we react carbon wit the ore
It’s more reactive so it’s more reactive than iron and it displaces the iron
What does reduction mean
The loss of oxygen
What does oxidation mean
Gaining oxygen
What is electrolysis used for
To extract metals that are more reactive than carbon
What metals are found in their native states
Gold and platinum
Name 2 biological methods of extraction
Bioleaching and phytoextraction
What is bioleaching
A process of using bacteria to dissolve metals instead of using chemical solutions
What is phytoextraction
A cost-effective plant-based technology for the removal of metals from the environment
When are metals oxidised
When they react with other elements
The more reactive a metal is the more what?
The more easily it loses electrons and so is more easily oxidised.
What does the bacteria used in bioleaching make?
Leachate
What is leachate
A solution containing copper ions
