Checkup on Chapter 19

Ammonium nitrate (${\mathrm{NH}}_4{\mathrm{NO}}_3$) is an important fertiliser. The ions in it can be identified by tests. Suggest if the given tests will confirm the presence of ions?

TEST: When a solution of barium ions is added to a solution of the compound, a white precipitate forms.

Ammonium nitrate (${\mathrm{NH}}_4{\mathrm{NO}}_3$) is an important fertiliser. The ions in it can be identified by tests. Suggest if the given tests will confirm the presence of ions?

TEST: When sodium hydroxide solution and aluminium foil are added to the solid, ammonia is given off after gentle heating.

A sample of mineral water contained these ions: 

Make two lists, one for the anions and the other for the cations present in this mineral water.

A sample of mineral water contained these ions: 

Which metal ion is present in the highest concentration?

A sample of mineral water contained these ions: 

What mass of calcium metal would be present in a small bottle of water, volume $50 {\mathrm{cm}}^3$?

A sample of mineral water contained these ions: 

Which of the ions will react with barium nitrate solution to give a white precipitate?

A sample of mineral water contained these ions: 

Of the metal ions, only calcium can be identified by a precipitation test. Why is this?

A sample of mineral water contained these ions: 

A sample of the water is heated with sodium hydroxide and aluminium foil. Ammonia gas could not be identified, even though the nitrate ion is present. Suggest a reason.