alleryAccording to Brønsted-Lowry, an acid is a substance that:
AAccepts a proton
BDonates a proton
CDonates an electron pair
DAccepts an electron pair
Answer & Solution
Correct answer: B. Donates a proton
1. Brønsted-Lowry: acid donates H⁺ (proton); base accepts H⁺.
2. (A) is the base definition; (C) is the Lewis base; (D) is the Lewis acid.
3. Example: in HCl + H₂O → Cl⁻ + H₃O⁺, HCl is the acid, H₂O is the base.
_Source: syllabus Chem Ch 7 §7.10 Brønsted Acids and Bases_
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