Extracting Metals And Equilibria

Question 1

Reactivity series increasing order?

Answer 1

Gold, silver, copper, hydrogen, iron, zinc, carbon, aluminium, magnesium, calcium, sodium, potassium

Question 2

Metals that react with water?

Answer 2

Potassium, sodium, calcium

Question 3

Metals that react with dilute acid?

Answer 3

Potassium, sodium, calcium, magnesium, aluminium, carbon, zinc, iron

Question 4

Oxidation and reduction in terms of oxygen?

Answer 4

Oxidisation means gain oxygen

Reduction means loss oxygen

Question 5

How can you extract metals less reactive than carbon?

Answer 5

They can be extracted by their oxides by reduction with carbon (heated)

Question 6

How to extract a metal more reactive than carbon?

Answer 6

Electrolysis but it is more expensive due to large amount of energy needed

Question 7

Phytoextraction?

Answer 7

Plants absorb metal compounds, through their roots
They concentrate compounds into their shoots and leaves
The plants can be burned to produce an ash that contains the metal compounds

Question 8

Bacterial extraction?

Answer 8

Some bacteria absorb metal compounds
They produce solutions called leachates which contain them
Scrap iron can be used to obtain the metal

Question 9

Why recycling metals is better?

Answer 9

Requires less energy than to extract from ores
Mining ores is bad for the environment
Metals can be reused