Ionisation energy of `A1=5137KJmol^(-1)(DeltaH)` hydration of `Al^(3+)=-4665KJmol^(-1).(DeltaH)_(hydration)` for `Cl^(-)=-381KJmol^(-1)` . Which of the following statement is correct?

Answer

C

Explanation

If `AlCl_(3)` is present in ionic state in aqueous solution, it will have `Al^(3+)` and `3Cl^(-)` ions. Standard heat of hydration of `Al^(3+)` and `3Cl^(-)` ions.
`=-4665 + 3 xx (-381) = -5808` kJ/mole.
Required energy of ionization of Al = 5137 kJ/`"mole"^(-1)`
Hydration energy overcomes ionization energy
`therefore AlCl_(3)` would be ionic in aqueous solution.