My teacher told me superoxide and peroxide anion are more basic than hydroxide but according to Wikipedia

Given that the hydroperoxyl radical has a pKa of around 4.8

and and pKa of H2O is

Acidity (pKa) 13.995[9][10][b]

Therefore, basicity of superoxide anion should be lesser than hydroxide as hydroperoxyl radical is more acidic than water.

For hydrogen peroxide I am not able to find pKa for both the hydrogen as it has two hydrogen so I don't know how to compare it, and I am not able to find the data of pKb of radical directly.

  • $\begingroup$ Water pKa is not the same thing as pKw. $\endgroup$
    – Poutnik
    Commented Jul 27, 2021 at 14:25
  • $\begingroup$ Its given on wikepedia , i have provided the link you can check also $\endgroup$ Commented Jul 27, 2021 at 15:01
  • $\begingroup$ OK, I have seen the reasoning for both 14.0 and 15.7. Your Q is OK. See also chem.libretexts.org/Bookshelves/Organic_Chemistry/… $\endgroup$
    – Poutnik
    Commented Jul 27, 2021 at 15:57


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