Nitrates and Nitrites with FeSO4 + CH3COOH

  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. Borek

    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. 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. Borek

    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. 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. Borek

    Staff: Mentor

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