Question

According to Bronsted-Lowry concept, the relative strengths of the bases $C{H}_{3}CO{O}^{-},O{H}^{-}$ and $C{l}^{-}$ are in the order:

• A. $O{H}^{-}>C{H}_{3}CO{O}^{-}>C{l}^{-}$
• B. $C{l}^{-}>O{H}^{-}>C{H}_{3}O{O}^{-}$
• C. $C{H}_{3}CO{O}^{-}>O{H}^{-}>C{l}^{-}$
• D. $O{H}^{-}>C{l}^{-}>C{H}_{3}CO{O}^{-}$

Answer 1

The correct option is A $O{H}^{-}>C{H}_{3}CO{O}^{-}>C{l}^{-}$

The Bronsted-Lowry concept is an acid base reaction theory which states that when an acid and a base react with each other, the acid forms its conjugate base and the base forms its conjugate acid by exchange of a proton.

$Acid+base\rightleftharpoons \text{conjugate base}+\text{conjugate acid}\text{Acidic strengths}:HCl>C{H}_{3}COOH>H_{2}O\text{Conjugate base strengths}:C{l}^{-}<C{H}_{3}CO{O}^{-}<O{H}^{-}$

Option A is correct.