discuss the preparation of nitrogen with proper condition? for 3 marks pls say
Answers
Answer:
To prepare pure nitrogen in the laboratory, a mixture of ammonium chloride (NH4Cl) and sodium nitrite (NaNO2) is heated. The first product that is formed is ammonium nitrite (NH4NO2). This compound is very unstable, and breaks up into nitrogen and water.
Explanation:
One method of creating nitrogen from air is oxidize some material to rid the air of the oxygen in it. Burning carbon-based materials does not work, since the result is Carbon Dioxide gas (CO2). The idea is to get rid of most gases that are not nitrogen.
Burning phosphorus or allowing iron filings to oxidize in a closed container results in nitrogen and a small amount of other gases from the air in the enclosed chamber. The oxygen has been removed.
Another method is to pass a air over hot copper gauze in an enclosed container. The copper combines with the oxygen, forming copper oxide and leaving nearly pure nitrogen.
2Cu + O2 + N2 → 2CuO + N2