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Which one is a stronger acid- HOCl or HOI?

  1. Sep 24, 2010 #1
    I know that HI is a stronger acid that HCl because of the weak H-I bond which can break easily in aqueous solution. But I can't understand why HOCl is a stronger acid that HOI (as per my book)?
  2. jcsd
  3. Sep 24, 2010 #2
    Check their structures (hint: H isn't bonded directly to the halogen in either case). How do you think Cl will affect the H-O bond in comparison with I? Think about electronegativities here...
  4. Sep 24, 2010 #3
    I got it. Chlorine being more electronegative atom withdraws oxygen towards itself, facilitating the release of H+
  5. Sep 24, 2010 #4


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    Staff: Mentor

    Attracts electrons.
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