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Homework Help: Iron ppt? Inorganic reactions

  1. Sep 12, 2006 #1
    I'm with a small doubt let me show for you:

    I have a solution:
    KNO3 + Fe(SCN)3

    Plus:
    Na2SO4 (aq)

    I would like to know if could happen it?

    ---> NaNO3 + FeSO4↓ppt red + KSCN

    Or plus:

    NaOH (aq)

    Could Happen ?
    ----> NaNO3+ Fe(OH)3 ↓ppt red +KSCN

    Thank you

    Paulo
     
  2. jcsd
  3. Sep 13, 2006 #2
    Yes, it happened : But
    6KNO3+ 2Fe(SCN)3+ 3Na2SO4---->Fe2(SO4)3 ↓ppt red + 6KSCN (aq) + 6 NaNO3 (aq)

    Now I want to know how precipitate the [SCN] from aqueous solution NaNO3 + KSCN

    Could anyone help me?
    Thanks
     
  4. Sep 13, 2006 #3
    Maybe it could being done add NaOH (aq)?
     
  5. Sep 13, 2006 #4
    NaOH isn't good to precipitate KSCN ...... the KSCN is unsoluble into etanol but is a bit expansive.....until now
     
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