Tests for Anions

Posted on February 5, 2010 by Kate

Chemistry Page

Equipment:

Test tubes
Dropper
Limewater
Magnesium sulfate
Barium chloride
Silver nitrate
Hydrochloric acid
Ammonium molybdate
Ammonia
Cold iron sulfate

Layout as following

Anion

  • Test
  • Result

 

Carbonate

  • Add MgSO4
  • White precipitate formed

Carbonate

  • Add dilute HCl
  • Turns limewater milky

Hydrogencarbonate

  • Add MgSO4
  • White precipitate formed on heating

Hydrogencarbonate

  • Add dilute HCl
  • Turns limewater milky

Chloride

  • Add AgNO3
  • White precipitate soluble in ammonia

Nitrate

  • Mix with cold FeSO4, heat gently
  • Brown ring forms

Sulphate

  • Add BaCl2
  • White precipitate formed insoluble in HCl

Sulphite

  • Add BaCl2
  • White precipitate formed soluble in HCl

Phosphate

  • Add ammonium molybdate heat gently
  • Yellow precipitate forms soluble in ammonia reagent
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About Kate

I'm studying for my Leaving Cert this year. Find me over at http://katenap.wordpress.com or follow me on twitter.com/UltimaEsperanza.
This entry was posted in Chemistry, Leaving Cert and tagged , , . Bookmark the permalink.

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