Question

Identify the conjugate acids and bases in the following equation:
$N{H}_3+H_{2}O\rightleftharpoons N{H}_4^{+}+O{H}^{-}$

• A. $(H_{2}O,O{H}^{-})$ and $(N{H}_2^{+},N{H}_3)$
• B. $(H_{2}O,O{H}^{-})$ and $(N{H}_4^{+},N{H}_2^{2-})$
• C. $(H_{2}O,O{H}^{})$ and $(N{H}_3,N{H}_4)$
• D. $(H_{2}O,O{H}^{-})$ and $(N{H}_4^{+},N{H}_3)$

Answer 1

The correct option is D $(H_{2}O,O{H}^{-})$ and $(N{H}_4^{+},N{H}_3)$

$N{H}_3+H_{2}O\leftrightarrow N{H}_4^{+}+O{H}^{-}$
Conjugate Acid-Base =$(H_{2}O,O{H}^{-})and(N{H}_4^{+},N{H}_3)$
A conjugate acid, within the Brønsted–Lowry acid–base theory, is a species formed by the reception of a proton $(H+)$ in a chemical reaction. Hence, a conjugate base is a species formed by the removal of a proton from an acid.
In summary, this can be represented as the following chemical reaction:
Acid + Base ⇌ Conjugate Base + Conjugate Acid
conjugate base : substance formed when an acid loses a hydrogen ion . Considered a base because it can gain a hydrogen ion to reform the acid .
Ex $C{l}^{-}$ is the conjugate base of $HCl$