ICSE CHEMISTRY CLASS 10 PRACTICAL CHEMISTRY

Test for Anion present in the given salt:

Anion	Test	Observation
Chloride ion – Cl^1-	The salt is heated with Conc. Sulphuric acid (OR) When silver nitrate solution is added	A pungent odour gas which gives dense white fumes with glass rod dipped inn Ammonia solution. A white ppt. is formed which is soluble in excess Ammonium hydroxide
Nitrate ion – NO₃^1-	The salt is heated in a glass test tube (OR) To the salt solution FeSO₄ is added and Conc. Sulphuric acid is added drop wise.	Reddish brown vapours Brown ring
Carbonate ion – CO₃^2-	Dil. acid is added	Effervescence - turns lime water milky – no effect on acidified KMnO₄ and K₂Cr₂O₇.
Sulphite ion – SO₃^2-	Dil. acid is added (OR) Barium chloride solution is added	Colourless gas – turns lime water milky – decolourizes KMnO₄ and turns K₂Cr₂O₇ to clear green solution. A white ppt. which is soluble in dilute HCl or HNO₃.
Sulphate ion – SO₄^2-	Barium chlorie solution is added.	A white ppt. which is insoluble in dilute HCl or HNO₃.