Ammonium ions (NH 4 +) – found in ammonium compounds such as ammonium chloride, ammonium nitrate and ammonium sulfate – can be identified by heating a solution of the ions with sodium hydroxide.

Fertilisers containing nitrate ions (NO 3-) not only contain an essential ... Nitric acid is then used to make ammonium nitrate which is high in nitrogen.

This process limits electrostatic repulsion and enhances nitrate ion aggregation at the interface ... half the global population. It relies on ammonium as its primary nitrogen source.