Chemistry - Salt Analysis Question with Solution | TestHub

The brown ring test is a typical nitrate test that involves adding iron(II) sulphate to a nitrate solution, then slowly adding strong sulfuric acid until the acid forms a layer below the aqueous solution. The existence of the nitrate ion will be shown by the formation of a brown ring at the junction of the two layers. Dark brown ring is formed in the confirmatory test of${\mathrm{NO}}_3^{-}$− ions. Deep red precipitate with${\mathrm{FeCl}}_3$is formed in the presence of${\mathrm{CH}}_3{\mathrm{COO}}^{-}$ions.