+Acidity describes the tartness or corrosive nature of a substance, often a measure of its [Hydrogen Ions](/wiki/hydrogen-ions) concentration. It is quantified by the [pH Scale](/wiki/ph-scale), where lower values indicate greater acidity, profoundly influencing chemical reactions and biological processes.
+## See also
+- [Acid](/wiki/acid)
+- [Base](/wiki/base)
+- [pH](/wiki/ph)
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