Question

The strongest Bronsted base is

• A. $Cl{O}_3^{-}$
• B. $Cl{O}_2^{-}$
• C. $Cl{O}_4^{-}$
• D. $Cl{O}^{-}$

Answer 1

Answer: (D)

Strongest Bronsted base is that which has weakest conjugate acid. Base Conjugate acid $(base+H^{+})$ Base Conjugate acid $(base+H^{+})$ $Cl{O}^{-}$ $HClO$ $Cl{O}_2^{-}$ $HCl{O}_2$ $Cl{O}_3^{-}$ $HCl{O}_3$ $Cl{O}_4^{-}$ $HCl{O}_4$ $\because$ $\text{HClO}$ is weak conjugate acid. $\therefore$ $\text{Cl}{\text{O}}^{-}$ is strongest Bronsted base.