HABER PROCESS + NPK FERTILISERS
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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
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Why does the Haber process use a pressure of 200
Higher yield but not too high a pressure because it would be **too expensive**
3
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How are compounds of nitrogen, phosphorus and potassium used
Used as fertilisers to improve agricultural productivity **(NPK fertilisers)**
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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
Ammonium sulfate phosphate and nitrate can be produced by reaction of ammonia w/ requisite acid
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How is phosphate rock used with nitric acid
Reacted with nitric acid: phosphoric acid + calcium nitrate
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How is phosphate rock used with phosphoric acid
Reacted with phosphoric acid: calcium phosphate
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How is phosphate rock used with sulfuric acid
Reacted with sulfuric acid: mixture of calcium phosphate, calcium sulfate
Note 
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