To analyse the given sample of salt for detection of one acidic and one basic radical

Aim: - To analyse the given sample of salt for detection of one acidic and one basic radical

Observation table-

A) Detection of acidic  radical(anion)

S.N.	EXPERIMENT	OBSERVATION	INFERENCE
1	Salt + Dil. H2SO4 and warm solution	Colourless gas with vinegar like smell evolves	Acetate (CH3COO-) may be present
2.	Confirmatory test for Acetate: (a)  Oxalic acid test: take 1 g of salt in test tube and add small amount of oxalic acid + one -two drops of distilled water   (b)  Ferric Chloride test: take 1 g of salt in test tube and add 1-2 ml distilled water , shake well and add 1-2 ml of neutral ferric chloride solution to it	Smell of vinegar obtained       Deep red color appears	Acetate (CH3COO-) is confirmed       Acetate (CH3COO-) is confirmed

 

Detection of basic radical(cation)

S.N.	EXPERIMENT	OBSERVATION	INFERENCE
1	Salt + NaOH solution + heat	No gas evolve	Zero group is absent
2.	Prepare original solution of salt by dissolving in 20 ml of water	Cleat solution is formed	Water soluble salt is present
3.	Small amount of OS + Dil. HCl solution	White precipitate is formed	Group -I is present Pb2+ may be present
4.	Confirmatory test of Pb2+: dissolve the precipitate in hot water and divide it into three parts (a)  part -1 + KI solution (b)  part-2 + potassium chromate   (c)  part-3 + few drops of alcohol + dil. H2SO4	Yellow precipitate  yellow precipitate is obtained which is soluble in NaOH  White precipitate is obtained which is soluble in ammonium acetate	Pb2+ is confirmed  Pb2+is confirmed   Pb2+ is confirmed

Result: in given sample of salt on acidic radical acetate (CH3COO^-) and one basic radical lead (Pb²⁺) is present.