Nitrogen and its Compounds: Laboratory preparation of nitrogen gas from the air

4.0 Nitrogen and its Compounds

4.2.1 Laboratory preparation of nitrogen gas from the air

Questions 4.2.1

1. Apart from rare gases, name two gases mixed with nitrogen in the air.
2. Suggest how you would remove each of the two gases named in 1 to remain with nitrogen gas.
3. To remove the two gases, we need to make the air flow. Suggest two possible means by which this may be done.
4. Given one large flask, conical flask, combustion tube, retort stand, trough and gas jar, draw a labelled diagram for the arrangement you would use to obtain nitrogen gas from the air.
5. Give one advantage of collecting nitrogen gas by passing it through water.
6. 1. Name the impurities in the sample of nitrogen gas so prepared.
   2. Give two reasons why we are not so much concerned about these impurities in the sample of nitrogen gas collected.
7. Write equations for the chemical reactions involving removal of the two gases named in 1.