Chemistry fc⚗️(triple)

Question 1

State 2 components of a composite(2)

Answer 1

A matrix or binder and a material called the reinforcer

Question 2

How must phosphate rock be treated before it can be used as a fertiliser? (1)

Answer 2

With nitric or sulfuric acid

Question 3

State the work equation for the haber process(3)

Answer 3

Nitrogen + hydrogen =ammonia

Question 4

Describe the features of laboratory production of NPK fertilisers

Answer 4

Batch, low concentration reactants, low yield, large input of energy

Question 5

How is ammonia removed from the haber process (2)

Answer 5

Cooled and liquified

Question 6

Describe the products of treating phosphate rock with nitric acid

Answer 6

Phosphoric acid and calcium nitrate. The phosphoric acid must be neutralised with ammonia or o produce ammonium phosphate

Question 7

NPK fertilisers contain what (3)

Answer 7

Compounds containing -nitrogen -phosphorus -potassium ions

Question 8

Describe the products of treating phosphate rock with sulphuric acid

Answer 8

Calcium phosphate and calcium sulphate (single superphosphate)

Question 9

Ammonia is used in the manufacture of what? (2)

Answer 9

Ammonium salts and nitric acid

Question 10

Describe the products of treating phosphate rock with phosphorus acid

Answer 10

Triple superphosphate

Question 11

State the reason aluminium does not corrode (1)

Answer 11

Aluminium has an oxide coating that protects the metal from further corrosion