was a Danish chemist who developed a theory to explain acids and bases at the same time as English chemist Thomas Lowry. The Brønsted-Lowry theory defines acids as any chemical that is able to donate a proton or hydrogen ion to a reaction. A base would then become any compound that gains or accepts a proton or hydrogen ion during a reaction.
Brønsted-Lowry theory is just one acid/base theory. There are Arrhenius acids and bases and Lewis acids and bases as well. Find out more about these theories
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