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Which species can behave as both a Brønsted acid and a Brønsted base?
- HSO4−
- Na2CO3
- NH3
- OH−
Correct answer: HSO4−
Solution
HSO4− can donate a proton, acting as a Brønsted acid, and it can also accept a proton, behaving as a Brønsted base, making it amphiprotic.
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