Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025
Definition
A conjugate base is the species that remains after an acid has donated a proton (H+ ion) during a chemical reaction. It is capable of gaining a proton in the reverse reaction, forming the original acid.
AP course connection
Topic 20.3: 20.3 Biological Acids and the Henderson–Hasselbalch Equation