Defines acids as substances that increase the concentration of hydrogen ions (H+) in aqueous solution, and bases as substances that increase the concentration of hydroxide ions (OH−).
Brønsted-Lowry Theory
Defines acids as proton (H+) donors and bases as proton acceptors. This theory expands the concept of acids and bases beyond aqueous solutions.
Conjugate Acid-Base Pairs
In the Brønsted-Lowry framework, an acid and a base that differ only by the presence or absence of a proton are known as a conjugate acid-base pair.
