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Electric Conduction of Ionic Compounds

Why is AlCl3 ...

Question

Why is AlCl3 covalent in vapour phase but ionic in aqueous solution state?

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Solution

Dear Student,

When AlCl₃ is in vapour phase it is covalent in nature as they share electron each other and there are no other molecule. But in solution phase it is ionic as in solution it has positive charge as well as negative charge they interact each other and form a compound due to solution effect.

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Q. Assertion :Anhydrous

A l C l_{3}

is covalent while aqueous

A l C l_{3}

is ionic. Reason: In water

A l C l_{3}

A l^{3 +}

C l^{-}

Q. A covalent compound which behaves like an ionic compound in aqueous solution is :

Q. Polar covalent compounds are __________ in gaseous state, but ionizes in aqueous solution state.

A l {C l}_{3}

is covalent. From the data given below, predict whether it would remain covalent or become ionic in aqueous solution.

Given : Ionization energy for

A l {C l}_{3} = 5137

^{- 1}

Δ_{H y d r a t i o n}

{A l}^{3 +} = - 4665

^{- 1}

Δ_{H y d r a t i o n}

{C l}^{-} = - 381

^{- 1}

A l C l_{3}

is covalent from the data given below predict whether it would remain covalent or become ionic in aqueous solution.

Ionization energy for A l C l_{3} = 5137 k J m o l^{- 1}

Δ H_{hydration}

A l^{+ 3} i s - 4665 k J m o l^{- 1}

Δ H_{hydration}

C l^{-}

k J m o l^{- 1}

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