Brønstedzuren
Brønstedzuren are acids according to the Brønsted–Lowry theory. An acid is a substance that donates a proton (H+) to a base during an acid–base reaction. In a typical process, a Brønsted acid HA transfers a proton to a base B, yielding the conjugate base A− and the conjugate acid BH+. In aqueous solution this often means HA donates a proton to water, forming H3O+ and A−. Brønsted bases are proton acceptors, and the concept of conjugate acid–base pairs follows: every Brønsted acid has a conjugate base, and every Brønsted base has a conjugate acid.
Common Brønsted acids include hydrochloric acid (HCl), sulfuric acid (H2SO4), nitric acid (HNO3) and acetic acid
The measured acidity, including pKa values, depends on the solvent; pKa in water differs from that in
Relation to other theories: every Brønsted acid is a Lewis acid (it donates a proton, i.e., a