Question

Is stronger acid than hydrogen fluoride in aqua solution?

Answer 1

H-I has longer bond length; long enough for H+ and I- to dissociate. This causes it to be more acidic in nature.

I- has a stable hold with the negative charge due to large size (Delocalization)

(Both these explanations satisfy the point, and so can be regarded correct)

Now consider that if the opposite result had been observed (Ka values), we could have probably explained it as:

Fluorine is more electronegative. So, it pulls the electron towards it more. This causes the H+ ion to be more free, causing greater acidic nature

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Answer 2

Answer:

It is due to

It is due toa. Higher H−F bond dissociation energy than H−Cl

It is due toa. Higher H−F bond dissociation energy than H−Clb. Stronger H−bonding of F−ion with H3O+ than Cl−.

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