Strength of oxoacids

[106036120]

Why would the strength of acidity go HClO > HBrO > HIO, if the bond length increases as the atomic radius gets bigger. Shouldn't the order be the opposite since I has the biggest bond length making it easier to remove the H.

[106046096]

Hi! For these oxoacids, you must consider the electronegativities because the more electronegative the central atom is, the stronger the acid will be. The electronegativity between the 3 would be Cl > Br > I based on the periodic trend. Since all three have the same amount of oxygen atoms, the resulting strength of acidity will be HClO > HBrO > HIO.