Which of the following is the correct definition of an acid according to the Brønsted-Lowry theory?
AA substance that produces hydrogen ions in water
BA proton donorCORRECT
CAn electron pair acceptor
DA substance with a pH less than 7
GCEChemistryAcids, Bases and Salts2021
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Why the answer is B, and why the others tempt you.
According to the Brønsted-Lowry theory, an acid is defined as a proton (H⁺) donor. Option A describes the Arrhenius definition, option C describes the Lewis definition, and option D is merely a property of acids in aqueous solution.
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