Acidity $K_{a}$
Basicity $K_{b}$
The Conjugate Seesaw $K_{a}\times K_{b}=K_{w}$

204917020
Posts: 31
Joined: Fri Apr 06, 2018 11:05 am

Why is HI(aq) a stronger acid than HF(aq)? I thought that since Fluorine wants to fill its octet and Hydrogen wants to share its one electron that would mean HF would be stronger since they would hold on tighter to eachother based on a larger difference in electronegativity, but HI is a stronger acid for some reason.

Jose Lupian 1C
Posts: 27
Joined: Fri Apr 06, 2018 11:03 am

### Re: Question about HF (aq)

HF(aq) is a weaker acid than HI(aq) because HF(aq) has a stronger bond than HI(aq). Remeber that the stronger the acid, the more easily the acid will give off protons. Since HI(aq) has weaker bonds than HF(aq), HI(aq) is the stronger acid.