Anion CH3COO- and Cations Pb+2

AIM: Analyse systematically the given mixture of inorganic compounds for two anions and two cations (by dry and wet test).

Test for Acidic Radicals

S.No.	Treatment	Observation	Inference
1	Mixture + dil. H₂SO₄+ Heat	Colourless vinegar like smell gas	Week acidic group present CH₃COO^– may be
2	Confirmatory test Sodium corbonate extract +neutral FeCl₃Solution	Reddish coloured solution is obtained	CH₃COO^– is confirmed
	Mixture + Oxalic acid + 2-3 drop water and rub	Vinegar smell	CH₃COO^– is confirmed

Test for Basic Radicals

S.No.	Treatment	Observation	Inference
1	Mixture + NaOH solution + Heat	no smell of ammonia	Zero group absent
2	Original solution + dil HCl	White ppt obtained	1^st group present Pb²⁺, Hg²⁺, Ag⁺ may be
3	Boil the above solution in water	White ppt soluble	Pb²⁺may be Hg²⁺, Ag⁺ absent
4	Confirmatory Test : Dissolve the ppt in hot water and divided in two part
5	1^st part +KI	Yellow ppt. is obtained	Pb²⁺ confirmed
6	2^nd part + K₂CrO₄	Orenge Yellow ppt. is obtained	Pb²⁺ confirmed
7	Dry Test- Dippted the platinum wire in dil. HCl and ignite it with ppt.	Light blue- white flame is obtained	Pb²⁺ confirmed

Result : The above given salt contains anions CH₃COO- and cations Pb+2 are present.