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Fertilisers

Ammonia Fertilisers.

Ammonia fertilisers are produced from the neutralisation
of ammonia with a mineral acid.
Ammonia is used to produce fertilisers because it contains nitrogen.

The main fertiliser is ammonium nitrate.
This is produced by the reaction of ammonia with nitric acid.

nitric acid    +    ammonia        ammonium nitrate.
HNO_3(aq)    +     NH_3(g)                 NH₄NO_3(aq)

The above reaction is an example of neutralisation,
giving a neutral salt (but no water).

Ammonia with sulfuric acid would give ammonium sulphate (NH₄)₂SO_4(aq)

Ammonium nitrate has a higher percentage of nitrogen
for the same mass of fertiliser.

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