Looking for classes? Ksquare Career Institute, Bengaluru →
Conjugate base for Bronsted acids $H_2O$ and HF are:
A
$OH^-$ and $H_2F^+$ respectively
B
$H_3O^+$ and $F^-$, respectively
C
$OH^-$ and $F^-$, respectively
D
$H_3O^+$ and $H_2F^+$, respectively
Detailed Solution
A conjugate base is formed by loss of $H^+$ from the acid.
$H_2O\xrightarrow{-H^+}OH^-$ (conjugate base); $H_3O^+$ is the conjugate acid of $H_2O$.
$HF\xrightarrow{-H^+}F^-$
Example: $HF+H_2O\rightleftharpoons F^-+H_3O^+$
So the conjugate bases are $OH^-$ and $F^-$, respectively.