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Question

On complete reaction of FeCl3 with oxalic acid in an 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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Solution

Answer :6
FeCl3+3H2C2O4+6KOHK3[Fe(C2O4)3]A+3KCl+6H2O
The secondary valency is the number of ions of molecules that are coordinated to the metal ion or it is the number of ligands attached or coordinated to metal ions.

Here secondary valency is 6

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