Thursday, 16 May 2013

2.38 describe tests for the anions


i) Cl-, Br- and I-, using dilute nitric acid and silver nitrate solution
  • Chloride ions + nitric acid + silver nitrate > white precipitate (silver chloride)
  • Bromide ions + nitric acid + silver nitrate > cream precipitate (silver bromide)
  • Iodide ions + nitric acid + silver nitrate > yellow precipitate (silver iodide)
ii) SO4 2- (sulphate ions) using dilute hydrochloric acid and barium chloride solution
  • SO4(2-) + HCl + Ba(2+) > white precipitate (barium sulphate)
iii) CO3 2-, using dilute hydrochloric acid and identifying the carbon dioxide evolved
  • Carbonate + acid > salt + water + carbon dioxide
  • Carbon dioxide produced will turn lime water cloudy

Posted by at
Labels: , ,

8 comments:

  1. Unknown5 January 2014 at 07:17

    really helpful, thanks so much! In any way related to lucychemistry.blogspot??

    ReplyDelete
  2. Unknown18 May 2016 at 12:21

    change ur name to the queen of backside saving

    ReplyDelete
  3. Anonymous21 May 2016 at 06:10

    Why do you add the hydrochloric acid for the sulfate test?

    ReplyDelete
  4. Unknown14 April 2017 at 03:44

    Wow very helpful in my chemistry test revision! thanks

    ReplyDelete
  5. alfachemistry17 August 2018 at 06:57

    We also provide analytical services and laboratory services to our customers. MORDANT BROWN 4

    ReplyDelete

Subscribe to: Post Comments (Atom)