If PKbfor fluoride ion at 25^@C is 10.83...

If `PK_b`for fluoride ion at `25^@C` is 10.83. predict the ionisation constant of hydrofluoric acid in water at this temperature.

`1.74xx10^(-5)`

`3.52xx10^(-3)`

`6.75xx10^(-4)`

`5.38xx10^(-2)`

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