Which acid has the largest ka. which acid has the largest . hio3(aq) hbro3(aq) hclo3(aq)  all three acids have the same ka?

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

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.

what is the question here. i think you messed up.