WET TESTS FOR BASIC RADICALS

(B)WET TESTS FOR BASIC RADICALS

(B1)  CLASSIFICATION OF BASIC RADICALS INTO GROUPS:

Group	Group reagent	Cation	Precipitated( color)
I	Dil HCL	Ag22+,Pb2+,Hg22+	Chloride(@white)
IIA	Dil HCL+H2S	Hg2+,Pb2+,Bi3+,Cu2+,Cd2+	Sulphide(@black)	black
IIB	Dil HCL+H2S	As3+,Sb3+,Sn2+/Sn4+	Sulphide(yellow,	yellow
			Sb2S3@orange)	orange
IIIA	NH4Cl+NH4OH	Al3+,Cr3+,Fe3+	Hydroxides
			Al(OH)3@white,
			Cr(OH)3@green,	green
			Fe(OH)3@brown	brown
IIIB	NH4Cl+NH4OH+H2S	Co2+,Ni2+,Mn2+,Zn2+	Sulphide
			CoS	Black
			NiS	Black
			MnS	Flesh
			ZnS(white)
IV	NH4Cl+NH4OH+(NH4)2CO3	Ba2+,Sr2+,Ca2+	Carbonate(@white)
V	No particular group reagent	Na+,K+,NH4+,Mg2+