Multiple Choice
Which of the following best describes the difference between a Lewis acid and a Bronsted-Lowry acid?
3. Acids and Bases
Acids and Bases
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Which of the following statements is true regarding the Bronsted-Lowry definition of acids and bases?
A
An acid is a substance that accepts a proton (H+) from another substance.
B
A base is a substance that accepts an electron pair from another substance.
C
An acid is a substance that donates a proton (H+) to another substance.
D
A base is a substance that donates an electron pair to another substance.
Verified step by step guidance1
Understand the Bronsted-Lowry definition: In the Bronsted-Lowry theory, an acid is defined as a proton (H+) donor, and a base is defined as a proton (H+) acceptor.
Analyze the given statements: The problem provides several statements about acids and bases. We need to determine which align with the Bronsted-Lowry definitions.
Evaluate the first statement: 'An acid is a substance that accepts a proton (H+) from another substance.' This contradicts the Bronsted-Lowry definition, as acids are proton donors, not acceptors.
Evaluate the second statement: 'A base is a substance that accepts an electron pair from another substance.' This describes a Lewis base, not a Bronsted-Lowry base, which accepts protons.
Identify the correct statement: 'An acid is a substance that donates a proton (H+) to another substance.' This aligns with the Bronsted-Lowry definition. Similarly, 'A base is a substance that accepts a proton (H+)' is the correct description for a Bronsted-Lowry base.
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