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Anhydrous AlCl(3) is covalent from the d...

Anhydrous `AlCl_(3)` is covalent from the data given below, perdict whether it would remain covalent or between ionic in aqueous solution
`IE_(1)` of `Al = 5140 kJ mol^(-1)`
`Delta_("hyd")H^(ɵ)(Al^(3+)) = -4665 kJ mol^(-1)`
`Delta_("hyd")H^(ɵ)(Cl^(ɵ)) = -380 kJ mol^(-1)`

Text Solution

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Total energy releasd during hydration of ions `(Al ^(3+) and Cl ^(-)) of =AlCl _(3) =- 4665 + 9-3 xx 381)=- 5808kJ "mole"^(-1).` Since the enrgy released during hydration is more `(5808 kJ "mole"^(-1))` than the inonization energy for `Al ( 5137kJ "mole" ^(-1)) . AlCl _(3)` would be ionic in aqueous solultion.
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