how sodium extract is made to test for nitrogen.
Answers
Answer:
The sodium fusion test, or Lassaigne's test, is used in elemental analysis for the qualitative determination of the presence of foreign elements, namely halogens, nitrogen, and sulfur, in an organic compound. It was developed by J. L. Lassaigne.
Explanation:
The test involves heating the sample strongly with clean sodium metal, "fusing" it with the sample. A variety of techniques has been described. The "fused" sample is plunged into water, and the usual qualitative tests are performed on the resultant solution for the respective possible constituents.
Answer:
This process is called Lassaigne’s test.
During the preparation of Lassaigne's extract, sulphur from the organic compound reacts if any with sodium to form sodium sulphide. It gives a violet colour with sodium nitroprusside due to the formation of sodium thio nitroprusside.