Asked by Charlie

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)

Answers

Answered by DrBob222
Add NH4SCN. Co(II) forms a tetrathiocyanate complex which is blue.
Cu(II) forma a black black ppt with KSCN
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