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AIF(3) is soluble in HF only in presence...

`AIF_(3)` is soluble in `HF` only in presence of `KF`. It is due to the formation of

A

`K_(3)[AlF_(3)H_(3)]`

B

`K_(3)[AlF_(6)]`

C

`AlH_(3)`

D

`K[AlF_(3)H]`

Text Solution

Verified by Experts

The correct Answer is:
B
`AlF_3`is insoluble in anhydrous HF because `F^(-)` ion is not available for hydrogen bonding. How it becomes soluble in the presence of little amount of KF due to the formation of a complex compound.
`AIF_(3) + 3KF to K_(3)[AIF_(6)]`
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