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Acid-base reactions involve an acid and a base that combine to form species like conjugate acids and conjugate bases.

2-Hexanol is a base. It receives a proton from hydrochloric acid and forms a conjugate acid. Hydrochloric acid gives its proton, leading to the formation of a conjugate base.

The reaction is shown as follows:

The reaction of compound a

Diethyl ether serves as a base. It receives a proton from hydrochloric acid to form a conjugate acid. Hydrochloric acid donates a proton, leading to the formation of a conjugate base.

The reaction is shown as follows:

The reaction of compound b

Tertiary amine acts as abase. It takes hydrogen from hydrochloric acid to form a conjugate acid. Hydrochloric acid gives a proton, leading to the formation of a conjugate base.

The reaction taking place is shown as follows:

The reaction of compound c

Secondary amine acts as a base. It acquires a proton from hydrochloric acid to form a conjugate acid. Hydrochloric acid gives its proton, leading to the formation of a conjugate base.

The reaction taking place is shown as follows:

The reaction of compound d