∞ generated and posted on 2022.02.03 ∞

A water solution that possess an excess of protons or a substance that upon addition to water results in possession of an excess of protons by the resulting solution.

An Acid, biologically, is a compound that reduces the pH of a water solution or instead is a water solution that possesses a pH that is lower than neutral 7.

Compounds which are acids either will ionize to lose hydrogen ions or instead will tend to gain hydroxyl ions.

Contrast with basic and see also pH.