Question

What is the conjugate base of $HCl{{O}_{3}}$ ?
A. ${{H}_{2}}O$
B. $ClO_{3}^{-}$
C. ${{H}^{+}}$
D. ${{H}_{2}}ClO_{3}^{+}$

Answer 1

Hint: Conjugate base is also a chemical compound formed by the ejection or removal of hydrogen from an acid. Conjugate base term was coined in Lewis acid-base theory. For example HA is an acid then ${{A}^{-}}$ will be the conjugate base of HA.

Complete Solution :
- In the question it is given that what is the conjugate base of $HCl{{O}_{3}}$ .
- We have to find the conjugate base of a given chemical from the given options.
- By removing hydrogen from the given chemical in the question we can get the conjugate base of the given compound $HCl{{O}_{3}}$ .
- Removal of hydrogen or proton from the chemical $HCl{{O}_{3}}$ is as follows.
\[HCl{{O}_{3}}\to {{H}^{+}}+ClO_{3}^{-}\]
- From the above chemical equation we can easily conclude that $ClO_{3}^{-}$ is the conjugate base of the given chemical in the question formed by the removal of hydrogen or proton.
- Because $ClO_{3}^{-}$ is going to be formed by the removal of hydrogen or proton from the given chemical in the question.
So, the correct answer is “Option B”.

Note: Don’t be confused with the terms conjugate acid and conjugate base. Both are not the same. We can get the conjugate acid of any chemical by adding hydrogen or proton to the respective chemical. For example ${{H}_{2}}ClO_{3}^{+}$ is the conjugate acid of the $HCl{{O}_{3}}$ . Means by removing hydrogen we will get conjugate base and by adding hydrogen we will get a conjugate acid.
Then $HCl{{O}_{3}}$ and $ClO_{3}^{-}$ are called conjugate acid base pairs.