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Posted by on Thursday, November 29, 2012 at 10:00am.

An unknown solution may contain one of the ions of the pair below. Devise a test which allows you to distinguish between the ions.

Cu2+(aq) and Co2+ (aq)

  • Chemistry - , Thursday, November 29, 2012 at 4:37pm

    Add NH4SCN. Co(II) forms a tetrathiocyanate complex which is blue.
    Cu(II) forma a black black ppt with KSCN

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