HABER PROCESS + NPK FERTILISERS

Why does the Haber process use a temperature of 450

Reaction is **exothermic, so low temperature used** however rate is **too slow** so temperature is increased

Why does the Haber process use a pressure of 200

Higher yield but not too high a pressure because it would be **too expensive**

How are compounds of nitrogen, phosphorus and potassium used

Used as fertilisers to improve agricultural productivity **(NPK fertilisers)**

How is industrial production of NPK fertilisers achieved

Ammonia used to manufacture ammonia salts

Ammonium sulfate phosphate and nitrate can be produced by reaction of ammonia w/ requisite acid

How is phosphate rock used with nitric acid

Reacted with nitric acid: phosphoric acid + calcium nitrate

How is phosphate rock used with phosphoric acid

Reacted with phosphoric acid: calcium phosphate

How is phosphate rock used with sulfuric acid

Reacted with sulfuric acid: mixture of calcium phosphate, calcium sulfate