Which of the following correctly lists the compounds in order of decreasing acidity? A)H₂O HC$\equiv$CH NH₃ CH₃CH₃ B)HC$\equiv$H H₂O NH₃ CH₃CH₃ C)CH₃CH₃ HC$\equiv$CHNH₃ H₂O D)CH₃CH₃HC$\equiv$CH H₂O NH₃ E)H₂O NH₃ HC$\equiv$CH CH₃CH₃

Question

Which of the following correctly lists the compounds in order of decreasing acidity? A)H₂O > HC$\equiv$CH > NH₃ > CH₃CH₃ B)HC$\equiv$H > H₂O > NH₃ > CH₃CH₃ C)CH₃CH₃> HC$\equiv$CH>NH₃ > H₂O D)CH₃CH₃>HC$\equiv$CH > H₂O > NH₃ E)H₂O > NH₃ > HC$\equiv$CH > CH₃CH₃

Quizplus · Accepted Answer

The correct order of decreasing acidity among the given compounds is based on their structural characteristics and the ability of their conjugate bases to stabilize the negative charge. Sulfuric acid (HSO4-) is a very strong acid due to its ability to stabilize the negative charge through resonance and inductive effects. Trifluoroacetic acid (CF3COOH) is more acidic than acetic acid due to the electron-withdrawing effect of the trifluoromethyl group, which stabilizes the conjugate base. Ammonia (NH3) is a weak base and its conjugate acid (NH4+) is not as strong as the other acids listed. Acetic acid (CH3COOH) is weaker than trifluoroacetic acid due to the lack of strong electron-withdrawing groups. Therefore, the correct order is sulfuric acid > trifluoroacetic acid > ammonia > acetic acid.

Which of the Following Correctly Lists the Compounds in Order ≡\equiv≡

Which of the Following Correctly Lists the Compounds in Order $\equiv$