I have two acids: $\ce{HClO4}$ and $\ce{HClO2}$ how do I determine which is the strongest acid without knowing $K_a$? The two hydrogens are bound both to an oxygen so there isn't anything to differentiate them, how can I proceed?
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1related http://chemistry.stackexchange.com/questions/40676/relative-strength-of-strong-acids – Mithoron Jan 09 '17 at 13:07
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$\ce{HClO4}$ is stronger acid due to the formation of more stable conjugate base. Also there are more number electronegative oxygen atoms in case of $\ce{HClO4}$ , so acidity should be more.
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