Question

Which acid has the largest ka.

which acid has the largest .



hio3(aq)



hbro3(aq)



hclo3(aq)



 all three acids have the same ka?

Answer 1

dissociation of proton from the acid depends upon the central atoms's electronegativity

More is the electronegativity of halogen ⇒ more is its pull on the oxygen ⇒ easier will the bond breakage of O-H ⇒ higher the acidity

In terms of E.N :

Cl > Br > I

so HClO₃ is highest acidity with the highest Ka value