Why are carboxylic acids more acidic than alcohols or alkynes? (choose all that apply)

Group of answer choices:

a. Carboxylate ions have resonance, while alkoxides and acetylides don't

b. Carboxylic acids are sp2 hybridized while alkynes are sp hybridized and alcohols are sp3 hybridized

c. The carboxylate O - is near a 2nd very electronegative O atom

d. Both carboxylic acids and carboxylates have resonance stabilization

The answers are (A.) Carboxylate ions have resonance, while alkoxides and acetylides don't (D.) Both carboxylic acids and carboxylates have resonance stabilization

Explanation:

When alcohols or alkynes donate a proton (H+), they become alkoxides acetylides respectively. Carboxylic acids on the other hand form carboxylate ions.

Carboxylate ions are more stable than their alkoxide and acetylides counterparts, because they possess a resonance structure which disperses its negative charge and allows for the valence electrons to be effectively delocalized.

Hence, carboxylic are more acidic than alcohols or alkynes.