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Addition of hydrogen halids to ethem

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    why is the rate of addition is in the order of their strength as acids?
    HCl>HBr>HI
    and why H+ ion adds first to the alkene
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    (Original post by reb0xx)
    why is the rate of addition is in the order of their strength as acids?
    HCl>HBr>HI
    and why H+ ion adds first to the alkene
    I don't think your order of acid strength is correct
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    (Original post by chembob)
    I don't think your order of acid strength is correct
    well then correct it for me and answer the question, please.
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    (Original post by reb0xx)
    well then correct it for me and answer the question, please.
    The order of acid strength goes as follows

    HI > HBr > HCl

    As an increasing size of anion --> poorer orbital overlap --> weaker bonding --> more likely to dissociate

    Hence for HI you have greater concentrations of H+ and X- as compared to HBr or HCl

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Updated: May 3, 2012
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