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Describe the reactions involved in the detection of nitrogen in an organic compound by Lassaigne method. |
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Answer» SOLUTION :Detection of Nitrogen: The following reactions are INVOLVED in the detection of nitrogen with formation of PRUSSIAN BLUE PRECIPITATE conforming the presence of nitrogen in an organic compound. (i) `underset("Sodium")(Na)+underset("From organic Compound")(underset(ubrac)C+N) rarr underset("Sodium cyanide")(NaCN)` (ii) `underset("Ferrous sulphate")(FeSO_(4))+underset("Sodium hydroxide")(2NaOH) rarr underset("Ferrous hydroxide")(Fe(OH)_(2))+Na_(2)SO_(4)` (iii) `6NaCN + Fe(OH)_(2) rarr underset("Sodium ferrocyanide")(Na_(4)[Fe(CN)_(6)])+2NaOH` (iv) `3Na_(4)[Fe(CN)_(6)]+4FeCl_(3) rarr underset("Ferric ferrocyanide(Prussian blue precipitate)")(Fe_(4)[Fe(CN)_(6)]darr+12NaCl)` |
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