Qualitaive Test for Ammonia in given sample [CCF-SEMV-DSCC-11-P]

 

Experiment	Observation	Inference
Litmus Paper Test: The sample solution is poured on damp Red litmus paper.	The red litmus turns blue.	Ammonia may be present.
Reaction with Hydrogen Chloride : Holding A glass rod dipped in concentrated hydrochloric acid near the source of the gaseous sample.	A dense white cloud (solid ammonium chloride) is formed.	Ammonia  is present.
Copper(II) Sulfate Test: Aqueous sample reacts with copper sulfate solution. If the amount of sample soln. is small     If the amount in excess	Pale blue precipitate occur.[Copper (II)hydroxide] Deep blue solution is formed . Tetraammine copper(II) sulfate]	Ammonia is present.
Nessler’s Reagent Test [ Nessler’s Reagent = Potassium tetraiodomercurate (II) ] [Confirmatory Test]  2-3 ml of sample solution was taken in a clean test tube. A few drops of Nessler’s reagent added to the sample.	Solution turns pale yellow to orange color .   A distinct reddish brown precipitate in formed.	Presence of trace amount of ammonia in the sample is confirmed.   It is confirmed that high concentration of ammonia is present in the sample.
2K2[HgI4] + 3KOH + NH3 ➡️   [Hg2N]I . H2O [Millon’s base] + 7KI + 2H2O

Qualitative Test for Urea :https://biomassfootprints.blogspot.com/2025/12/qualitative-tests-for-urea-in-given.html

Qualitative Test for Uric acid: https://biomassfootprints.blogspot.com/2025/12/qualitative-tests-for-uric-acid-in.html