Here's a breakdown:

* Base: A substance that can accept a proton (H+).

* Acid: A substance that can donate a proton (H+).

* Conjugate Acid: The species formed when a base accepts a proton.

Example:

* Base: Ammonia (NH3)

* Acid: Water (H2O)

* Reaction: NH3 + H2O ⇌ NH4+ + OH-

* Conjugate Acid: Ammonium ion (NH4+)

Key Points:

* Every acid has a conjugate base, and every base has a conjugate acid.

* The conjugate acid is always one proton (H+) richer than the original base.

* The strength of an acid and its conjugate base are inversely related. A strong acid has a weak conjugate base, and vice versa.