alleryStart learning →What is a base in aqueous solution?
AA substance that yields hydroxide ions
BA substance that yields hydronium ions
CA substance that yields free electrons
DA substance that yields hydrogen gas
Answer & Solution
Correct answer: A. A substance that yields hydroxide ions
1. A base dissolves in water and yields hydroxide ions.
2. NaOH dissociates directly into Na+ and OH-.
3. Ammonia instead reacts with water to release OH-, so it too is a base.
4. Producing hydronium ions is the mark of an acid, not a base.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 4 "Stoichiometry of Chemical Reactions", section 4.2 Classifying Chemical Reactions_
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