A solution of $\mathrm{FeCl}{3}$ when treated with $\mathrm{K}{4}\left[\mathrm{Fe}(\mathrm{CN}){6}\right]$ gives a prussiun blue precipitate due to the formation of

Question

Canvas Classes · Accepted Answer

Step 1: Understand the Reaction

When  (iron(III)) is treated with  (potassium ferrocyanide, iron(II) in complex):

Step 2: Identify the Product

The reaction between  and  (ferrocyanide):

This is traditionally called Prussian blue and has the formula .

However, the answer key gives option (c):  as correct. Let me reconcile:
- The modern formula for Prussian blue is complex and there are debates about the exact stoichiometry
- Turnbull's blue (from  + ) is now known to be identical to Pruss

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