Question

Identify a conjugate acid-base pair in the reaction

Answer 1

Answer: it’s A

Explanation:

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Answer 2

Answer:

The correct answer is option A.

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory:

An acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

For the given chemical equation:

$NH_3+H_2O\rightleftharpoons NH_4^{+}+OH^-$

Here, $H_2O$ is loosing a proton, thus it is considered as an acid and after losing a proton, it forms $OH^-$ which is a conjugate base.

And, $NH_3$ is gaining a proton, thus it is considered as a base and after gaining a proton, it forms $NH_4^{+}$ which is a conjugate acid.

Hence, the correct answer is option A.