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Out of the following complexes [Fe(OH 2 ) 6 ]Cl 2 and [Fe(OH 2 ) 6 ]Cl 3, whic...
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Out of the following complexes [Fe(OH2)6]Cl2 and [Fe(OH2)6]Cl3, which one is more acidic and why?
a) [Fe(OH2)6]Cl2, because Fe²⁺ has a lower charge density and polarises water molecules more strongly.
b) [Fe(OH2)6]Cl2, because Fe²⁺ has a higher charge density and releases protons easily.
c) [Fe(OH2)6]Cl3, because Fe³⁺ has a higher charge density and polarises water molecules more strongly, weakening the O–H bond.
d) [Fe(OH2)6]Cl3, because Fe³⁺ has a lower charge density and thus makes the solution acidic.
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