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 solution + dil H2SO4	Colourless, colourless gas with brisk effervescence which turn lime water milky	Group A anion (CO32- may be present)
2.	Confirmative test : (a)  BaCl2 Test : Salt solution + BaCl2   (b)  MgSO4 Test : Salt solution + MgSO4	White ppt of BaCO3  White ppt of MgCO3	CO32-Confirmed CO32- Confirmed

 

B. Detection of basic radical(cation)

S.N.	EXPERIMENT	OBSERVATION	INFERENCE
1	Salt + NaOH solution + heat	Colourless gas with ammonical smell evolves	Zero group is present NH4+ may be present
2.	Confirmatory test of  NH4+ :- (a)  put glass rod dipped in conc. HCl acid on the mouth of test tube (b)  Salt + conc. NaOH + Nessler reagent + Warm	Dense white fumes generate around glass rod Brown solution	NH4+ Confirm  NH4+ Confirm

 

Result: in given sample of salt on acidic radical carbonate (CO32-) and one basic radical ammonium (NH4+) is present.