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Multiple Choice
Which of the following is NOT a Brønsted-Lowry acid?
A
HCl
B
CH3CH2O+H2
C
CH3CO2H
D
BH3
Verified step by step guidance
1
Understand the definition of a Brønsted-Lowry acid: A Brønsted-Lowry acid is a substance that can donate a proton (H⁺) to another substance.
Examine each compound to determine if it can donate a proton: Start with HCl, which is a well-known strong acid and can donate a proton.
Consider CH3CH2O+H2: This is an oxonium ion, which can donate a proton, making it a Brønsted-Lowry acid.
Look at CH3CO2H (acetic acid): This compound can donate a proton from its carboxylic acid group, qualifying it as a Brønsted-Lowry acid.
Analyze BH3: Borane (BH3) does not have a proton to donate; instead, it acts as a Lewis acid by accepting electron pairs. Therefore, it is not a Brønsted-Lowry acid.