Question

Conjugate base for Bronsted acids $H_{2}O$ and $HF$ are

• A. $O{H}^{-}$ and $F^{-}$, respectively
• B. $O{H}^{-}$ and $H_2{F}^{+}$, respectively
• C. $H_3{O}^{+}$ and $F^{-}$, respectively
• D. $H_3{O}^{+}$ and $H_2{F}^{+}$, respectively

Answer 1

The correct option is A $O{H}^{-}$ and $F^{-}$, respectively

The conjugate base formed after releasing $H^{+}$ ions so for given $H_{2}O$ and $HF$, conjugate base will be

$H_{2}O\to \underset{conjugatebase}{O{H}^{-}}+H^{+}HF\to \underset{conjugatebase}{F^{-}}+H^{+}$

Hence, option (a) is correct answer.