alleryStart learning →What is left after an acid has donated its proton?
AIts conjugate acid
BA neutral salt
CIts conjugate base
DA hydronium ion
Answer & Solution
Correct answer: C. Its conjugate base
1. Losing a proton leaves a species one hydrogen ion short of the original acid.
2. That species is called the conjugate base of the acid.
3. It counts as a base because it can take the proton back and re-form the acid.
4. So HF gives the fluoride ion, and sulfuric acid gives the hydrogensulfate ion.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 14 "Acid-Base Equilibria", section 14.1 Brønsted-Lowry Acids and Bases_
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