On complete reaction of FeCl₃ with oxalic acid in aqueous solution containing KOH, resulted in the formation of product A. The secondary valency of Fe in the product A is (Round off to the Nearest In

Question

On complete reaction of FeCl₃ with oxalic acid in aqueous solution containing KOH, resulted in the formation of product A. The secondary valency of Fe in the product A is  (Round off to the Nearest Integer)

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Strategy:
 Write out the reaction between iron(III) chloride and excess oxalate, deduce the complex assigned to 'Product A', and state its secondary valency (coordination number).

Step 1: The Chemical Reaction
Iron(III) chloride reacts with excess oxalic acid and potassium hydroxide to form a stable, bright green complex called potassium trioxalatoferrate(III).

Product A is .

Step 2: Secondary Valency
The secondary valency refers to the coordination number.
The complex contains 3 oxalate () l

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