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Describe the procedure for preparation of Nitrogen (II) oxide.

      

Describe the procedure for preparation of Nitrogen (II) oxide.

  

Answers


Kavungya
Procedure:
- Action of heat on 50% concentrated nitric acid on copper turnings.
- Not any heat is required.
fig927420191259.png

Observations:
- An effervescence occurs in the flask; with brown fumes because the nitrogen (II) oxide produced reacts with oxygen of the air in the flask to form a brown gas, nitrogen (IV) oxide.
fig1027420191259.png
- The brown fumes eventually disappear and the gas collected over water.
- The NO2 fumes dissolve in the water in the trough, resulting into an acidic solution of nitrous acid.
- The residue in the flask is a green solution of copper (II) nitrate.
- Industrially, the gas is obtained when ammonia reacts with oxygen in the presence of platinum catalyst.
- This is the first stage in the production of nitric acid.
Kavungya answered the question on April 27, 2019 at 10:02


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