Question

What is the conjugate acid of$N{{H}_{3}}$?

Answer 1

Hint: As we know that conjugate acid is a chemical compound formed when an acid donates a proton that is ${{H}^{+}}$ to a base or in other words we can say that it is a base with a hydrogen ion added to it and in the reverse reaction it loses a hydrogen ion. So we have to write down the conjugate acid of $N{{H}_{3}}$.

Complete answer:
Let us understand about conjugate acid followed by writing down the conjugate acid of $N{{H}_{3}}$ as follows:-
Conjugate acid: According to the Bronsted-Lowry system, an acid reacts through donation of a proton to base. While doing so, the acid becomes its conjugate base and the formula of the conjugate base is the formula of the acid with one less hydrogen. So the reacting base here becomes its conjugate acid and the formula of the conjugate acid is the formula of the base with one more hydrogen ion. The reaction is shown below:-
$Acid\text{ }+\text{ }Base\text{ }\rightleftharpoons \text{ }Conjugate\text{ }Base\text{ }+\text{ }Conjugate\text{ }Acid$
As we know that ammonia that is $N{{H}_{3}}$ is a base. When it reacts with a proton (${{H}^{+}}$) containing acid, the proton attaches to the base and it becomes the conjugate acid of the same. The reaction is shown below:-
$N{{H}_{3}}+{{H}^{+}}\rightleftharpoons N{{H}_{4}}^{+}$
-Hence the conjugate acid of ammonia ($N{{H}_{3}}$) is$N{{H}_{4}}^{+}$.

Note:
-Remember that a cation can be a conjugate acid and an anion can be a conjugate base depending on which substance is involved in the reaction.
-Also the simplest anion that can be a conjugate base is the solvated electron whereas its simplest conjugate acid is the atomic hydrogen.