Tests for Anions

Test for Cl^-

add: silver nitrate

observe : white precipitate

explanation : formation of silver chloride

confirm : precip dissolves in dilute ammonia

Test for SO₄^2- and SO₃^2-

add: barium chloride

observe: white precipitate

explanation: formation of barium sulfate/barium sulfite

confirm:add hydrochloric acid, sulfate-precip remains, sulfite-precip dissolves

Test for CO₃^2-

add: hydrochloric acid

observe: fizzing that turns limewater milky

explanation: formation of CO₂

confirm: add magnesium sulfate, carbonate- magnesium carbonate (white precip) forms, hydrogencarbonate- magnesium hydrogencarbonate forms (no precip)

Test for NO₃^-

add: iron (II) sulfate followed by conc. sulfuric acid

observe: brown ring at junction

explanation: NA

confirm: NA

Test for PO₄^3-

add: ammonium molybdate and conc. nitric acid, place in warm water bath

observe: yellow precipitate

explanation: NA

confirm: NA