What did the Brönsted–Lowry definition of acids identify that made it a significant improvement over earlier definitions? (A) Acids contain hydrogen - HSC - SSCE Chemistry - Question 7 - 2002 - Paper 1

The Brönsted–Lowry definition identifies acids as proton donors. This was a significant advancement because it expanded the understanding of acids beyond just their composition to include their behavior in chemical reactions. Earlier definitions focused primarily on the presence of hydrogen or specific anions, while the Brönsted–Lowry approach emphasizes the transfer of protons, showcasing a broader range of acid behavior.