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I was not sure what category this question best fir so I decided to put it here since it has to do with acidity. My question was on how to know what oxoacid is the more acidic? This question gave the following oxoacids: HClO, HBrO, and HIO.
Since all the acids are attached to an oxygen, we look at the electronegativity for acid strength rather than atomic size. Thus, HClO would be the strongest acid, and HIO would be the weakest, because Cl is the most electronegative.
So, because the oxo-acids have the H attached to the O and not the halogen this causes a great difference in the stability of the molecule. Therefore, we look at the induction - which is the spread of the charge across the anion: which I really mean is the stability of the anion. It is key to note that these will have an overall negative charge. So we want to make the most stable anions. So, to pull the charge off the O we need a high electronegativity to pull thee away and stable across the whole membrane. So, the Cl will have the most electronegativity. Then Br and then I. SO the order is HCLO then HBrO and then HIO.
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