(a)[2]
Describe a test that would prove aqueous ammonium nitrite contains ammonium ions.
(b)[3]
A $25.0\,\text{cm}^3$ portion of $0.500\,\text{mol dm}^{-3}$ aqueous ammonium nitrite is heated. Calculate the volume of nitrogen produced at room temperature and pressure.
(c)[1]
When heated, ammonium nitrate, $\text{NH}_4\text{NO}_3$, breaks down in a manner similar to ammonium nitrite. Suggest the formulae of the two products formed in this reaction.
(d)[4]
Describe the method for preparing a pure sample of aqueous ammonium nitrate from dilute nitric acid.