In which of the following reactions does the H₂PO₄^- ion act as an acid? A)H₃PO₄ + H₂O $\to$ H₃O⁺ + H₂PO₄^- B)H₂PO₄^- + H₂O $\to$ H₃O⁺ + HPO₄²^- C)H₂PO₄^- + OH^- $\to$ H₃PO₄ + O²^- D)The ion cannot act as an acid. E)Two of these.

Question

Quizplus · Accepted Answer

In option B, the H₂PO₄^- ion donates a proton (H+) to the H₂O ion, which acts as a base. Therefore, the H₂PO₄^- ion acts as an acid. None of the other options have this acid-base reaction.

In Which of the Following Reactions Does the H2PO4- Ion →\to→

In Which of the Following Reactions Does the H₂PO₄^- Ion $\to$