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{{Acids and bases}}

An '''acid–base reaction''' is a [[chemical reaction]] that occurs between an [[acid]] and a [[base (chemistry)|base]]. It can be used to determine [[pH]] via [[Acid–base titration|titration]]. Several [[theory|theoretical]] frameworks provide alternative conceptions of the reaction mechanisms and their application in solving related problems; these are called the acid–base theories, for example, [[Brønsted–Lowry acid–base theory]].

 

 

It is important to think of the acid-base reaction models as theories that complement each other.<ref>{{cite journal|last=Paik|first=Seoung-Hey|title=Understanding the Relationship Among Arrhenius, Brønsted–Lowry, and Lewis Theories|journal=Journal of Chemical Education|language=en|volume=92|issue=9|pages=1484–1489|doi=10.1021/ed500891w|bibcode=2015JChEd..92.1484P|year=2015}}</ref> For example, the current Lewis model has the broadest definition of what an acid and base are, with the Brønsted-Lowry theory being a subset of what acids and bases are, and the Arrhenius theory being the most restrictive.