Chemistry QA: Anion Tests

Test For Iodide Anions

Add dilute nitric acid, followed by aqueous silver nitrate.

If Iodide anions are present, yellow ppt is formed (silver iodide)

Test For Nitrate Anion

Warm a mixture of aqueous NaOH & a piece of aluminium foil.

If nitrate anions are present, effervescence if observed (gas: ammonia, turns damp red litmus paper blue)

Test For Sulfate Anion

Add dilute nitric acid, followed by aqueous barium nitrate.

If sulfate anions are present, a white ppt is formed (barium sulfate)

Test For Chloride Anions

Add dilute nitric acid, followed by aqueous silver nitrate.

If white pp (silver chloride) t is formed, Chloride Anions are present.

Test For Carbonate Anions

Add dilute acid.

If effervescence is observed , a colourless, odourless gas that forms a white ppt in limewater is formed (CO2 gas)