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Nitrates and Nitrites with FeSO4 + CH3COOH

  1. Jun 9, 2012 #1
    1. The problem statement, all variables and given/known data
    I know that NO3- can be separately identify using newly made FeSO4 + H2SO4 using the brown ring test.
    The problem is can we identify NO2- using newly made FeSO4 + CH3COOH??? Replacing H2SO4 with CH3COOH???


    2. Relevant equations
    NO2-(aq) + FeSO4(aq) + CH3COOH(aq)[itex]\Rightarrow[/itex] [A Brown Circle]???
    or is this equation invalid???


    3. The attempt at a solution
    Nothing being attempted!!! :(
     
    Last edited: Jun 9, 2012
  2. jcsd
  3. Jun 9, 2012 #2

    Borek

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    Staff: Mentor

    NO2- or NO3-, you are inconsistent.

    If NO3- try to find out what is the reaction involved.
     
    Last edited: Jun 9, 2012
  4. Jun 9, 2012 #3
    Its NO2- is the problem. I've never learn such a reaction using Acetic acid to identify NO2- and a paper says you can't but I got it from a friend who says that using Acetic acid can identify NO2-.
     
  5. Jun 9, 2012 #4

    Borek

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    Staff: Mentor

    I find it rather unlikely. While NO2- can interfere, test in general requires concentrated sulfuric acid, I doubt acetic acid is strong enough.
     
  6. Jun 9, 2012 #5
    Yeah, I believe it too. So may I have the final conclusion as Acetic acid does nothing regarding detection of NO2-??? I've never heard such a test too!!!
     
  7. Jun 10, 2012 #6

    Borek

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    Staff: Mentor

    That's what I expect, but I have learned long to not assume everything I expect is true.
     
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