Qualitative Test For Fe3+

Question

Fe3+ produces blood-red coloration with thiocyanate due to formation of:

RankGuru · Accepted Answer

1. **Test Reagent**: Potassium thiocyanate ($KSCN$) or Ammonium thiocyanate.
2. **Chemical Reaction**: $Fe^{3+} + SCN^- \rightleftharpoons [Fe(SCN)]^{2+}$.
3. **Observation**: The formation of the **ferric thiocyanate complex** results in an intense, characteristic **blood-red coloration** in the solution.
4. **Reliability**: This is an extremely sensitive test used to detect even trace amounts of Iron(III) ions. 
5. **Note**: Fluoride ions can interfere with this test by forming a more stable, colorless hexa-fluoro complex $[FeF_6]^{3-}$.

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Qualitative Test For Fe3+

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