K4[Fe(CN)6] can be used to detect one or more out of Fe2+ , Fe3+, Zn2+, Cu2+, Ca2+ :

Engineering

Chemistry

Dilute Hydrochloric Acid and Sulphuric Acid

Question

K₄[Fe(CN)₆] can be used to detect one or more out of Fe²⁺ , Fe³⁺, Zn²⁺, Cu²⁺, Ca²⁺ :

All but Ca²⁺

Fe³⁺ , Zn²⁺ , Cu²⁺only

All

Fe²⁺ , Fe³⁺ only

College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

Fe²⁺ + [Fe(CN)₆]^4– → K₂Fe[Fe(CN)₆]^– [white] (in absence of air)

Fe³⁺ + [Fe(CN)₆]^4– → Fe₄[Fe(CN)₆]₃ (prussian blue ppt. or solution)

Zn²⁺ + [Fe(CN)₆]^4– (excess) → K₂Zn₃[Fe(CN)₆]₂^– [bluish white]

Ca²⁺ + [Fe(CN)₆]^4– → K₂Ca[Fe(CN)₆]¯ [white]

Cu⁺ + 2K⁺ + [Fe(CN)₆]^4– → Cu₂[Fe(CN)₆]¯ [chocolate brown]

Please subscribe our Youtube channel to unlock this solution.