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Multiple Choice
Which of the following compounds is considered a strong acid in aqueous solution?
A
Acetic acid (CH3COOH)
B
Ammonia (NH3)
C
Hydrochloric acid (HCl)
D
Water (H2O)
Verified step by step guidance
1
Understand the concept of acid strength: Strong acids completely dissociate in water, releasing all their hydrogen ions (H⁺) into the solution.
Identify the chemical formula of each compound: Acetic acid (CH₃COOH), Ammonia (NH₃), Hydrochloric acid (HCl), and Water (H₂O).
Recall the common strong acids: Hydrochloric acid (HCl) is a well-known strong acid because it fully dissociates in aqueous solution.
Compare the dissociation behavior: Acetic acid (CH₃COOH) is a weak acid as it partially dissociates, while ammonia (NH₃) is a weak base, and water (H₂O) is neutral.
Conclude that Hydrochloric acid (HCl) is the compound that is considered a strong acid in aqueous solution due to its complete dissociation.