1. H3O+ and H2F+, respectively.
2. OH– and H2F+, respectively.
3. H3O+ and F–, respectively.
4. OH– and F–, respectively.
Which of the following cannot act both as a Bronsted acid and as a Bronsted base?
| 1. | \(\mathrm{H C O_{3}^{-}}\) | 2. | \(\mathrm{NH_3}\) |
| 3. | \(\mathrm{HCl}\) | 4. | \(\mathrm{H S O_{4}^{-}}\) |