Question

Identify a conjugate acid-base pair in the reaction

NH3+H2O<>NH4^+OH^-

A. H2O and OH^-
B. NH3 and H2O
C. NH3 and OH^-
D. H2O and NH4^+

Answer 1

Answer: it’s A

Step-by-step explanation:

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Answer 2

The correct answer is option A.

Step-by-step 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.