Oxo acids, attraction between Y element and oxygen

[ducmod]

Hello!
I have read (I don't remember the source, and have it only in my notes now) that oxo acids can be strong if Y element has a high electronegativity.
If generic formula for oxo acids is HnYOm, than if Y has high electronegativity, it will cause the acid to become strong because Y will be "happy to be on the right side of equation because there are more electorns on the molecule"
HnYoM + H2O -> (double arrows here) H3 + Hn-1YOm
"the more electronegative Y is the better it can stabilize the Y-O product and the stronger the acid will be.
I don't get it. I will be grateful for your help and explanation.
For example:
HOI is weaker than HOCl
O has electronegativity of 3.5, I 2.5, Cl 3.00
I don't see how the above explanation works.
What I can assume from the numbers is that O and Cl has a small difference in their electronegativity of 0.5, which might mean that electrons are more or less equally shared between these elements; while the difference between O and I is 1, hence electrons are more likely to be around O. Would it mean that the O-Cl bond is stronger than O-I one and hence it weakens the H-O bond, allowing H to go?

Please, help me.
Thank you very much!

 

[ducmod]

Sad that I have not received any responses. Please, let me know if I have badly stated the question.

 

[CrazyNinja]

Here is how I understood it when I learned it. Hope it helps you too.

When we compare oxoacids across a group the strongest oxacid is the one which has the highest EN. This is because if the element has high EN it can pull the shared electrons of O-Y bond with greater ease. Now oxygen, by virtue, prefers the presence of electrons around it. Here in this case it can draw the electrons from the O-H bond closer towards itself. Thus the hydrogen gains a partial positive charge, making it easier for its extraction as H+.

Would it mean that the O-Cl bond is stronger than O-I one and hence it weakens the H-O bond, allowing H to go?

You were almost correct. It is not the bond strength but the EN difference which allowed the H+ to leave.