Question detail
What is the definition of a Brønsted-Lowry acid?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Acids and bases (A-level only)
Question
- A. A substance that donates protons
- B. A substance that accepts protons
- C. A substance that increases hydroxide ion concentration
- D. A substance that decreases hydrogen ion concentration
Answer
A substance that donates protons
Explanation
A Brønsted-Lowry acid is defined as a substance that donates protons (H+ ions) in a chemical reaction, which is a key concept in acid-base chemistry.
Common mistake
Misunderstanding Brønsted-Lowry Definitions
Students often confuse Brønsted-Lowry acids and bases with Arrhenius definitions, thinking that all acids must produce H+ ions in solution.
Remember that Brønsted-Lowry acids are defined as proton donors and bases as proton acceptors. For example, in the reaction HCl + H2O → Cl- + H3O+, HCl donates a proton to water, making it a Brønsted-Lowry acid.
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