Write the net ionic equation for the equilibrium that is established when ammonium nitrate is dissolved in water.

Answer : - While dissolving nitrate in water the pH of water becomes slightly acidic. The reaction is explained below :

At the first stage ammonium nitrate is dissolved in water:-



In the later stage when excess of ammonium ions are produced in water then these ions react with water again producing acidic hydronium ions. 

A reversible reaction occurs at this stage. 



So the net ionic equation for this reaction will be :-