Question

explain lassayne's test for nitrogen​

Answer 1

Answer:

Refer the attachment..

Answer 2

Lassayne's Test for Nitrogen:

The carbon and nitrogen present in the organic compound on fusion with sodium metal gives sodium cyanide (NaCN) soluble in water. This is converted in to sodium ferrocyanide by the addition of sufficient quantity of ferrous sulphate. Ferric ions generated during the process react with ferrocyanide to form prussian blue precipitate of ferric ferrocyanide.

Na + C + N → NaCN

6NaCN + FeSO4 → Na4[Fe(CN)6] + Na2SO4

Sodium ferrocyanide

Na4[Fe(CN)6] + Fe3+ → Fe4[Fe(CN)6]3

Ferric ferrocyanide