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4 May, 13:46

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

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Answers (1)
  1. 4 May, 16:22
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    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.
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