Fertilisers

Question 1

What do NPK fertilisers contain

Answer 1

nitrogen
phosphorus
potassium

Question 2

what are fertilisers used for

Answer 2

improve agricultural productivity

Question 3

how is nitrogen made suitable to be given to plants

Answer 3

ammonia from nitrogen is used to make ammonium salts and nitric acid

Question 4

how is potassium used in fertilisers

Answer 4

potassium chloride and sulfates found as minerals in ground given direct to plant

Question 5

why is phosphate based minerals not able to use as fertilisers immediatelty

Answer 5

insoluble in water

Question 6

what is phosphate rock treated with

Answer 6

nitric or sulfuric acid to produce soluble salts

Question 7

What happens when phosphate rock is treated with nitric acid + what happens after this process

Answer 7

makes phosphoric acid H3PO4
and
calcium nitrate

NEXT neutralised with ammonia to make ammonium phosphate (NH4)3 PO4

Question 8

what happens when phosphate rock is treated with sulfuric acid

Answer 8

forms single superphosphate

a mixture of calcium phosphate and calcium sulfate

Question 9

what happens when phosphate rock is reacted with phosphoric acid

Answer 9

produces triple superphosphate

calcium phosphate