2.38 describe tests for the anions: i Cl- , Br- and I- , using dilute nitric acid and silver nitrate solution ii SO4 2- , using dilute hydrochloric acid and barium chloride solution iii CO3 2- , using dilute hydrochloric acid and identifying the carbon dioxide evolved

Identification of anions 

Test: To an aqueous solution of the solid under test, add some dilute nitric acid followed by a few drops of silver nitrate solution.

chloride ion: white precipitate

bromide ion: cream precipitate

iodide ion: yellow precipitate

Sulfate ions

Test: Add dilute hydrochloric acid followed by a few drops of barium chloride solution with the sulfate ions

Result: White precipitate (of barium sulfate) 

Carbonate ions

Test: To either the solid, or an aqueous solution of the solid, under test add dilute hydrochloric (or nitric) acid

Result: Bubbles of gas. Will turn limewater milky.