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Amphoteric or Amphiprotic means the compound has both acidic and basic characteristics. You can identify this by looking to see if an atom has both a lone pair and H atom attached it. Thus, you could see that it could act as both a Lewis Base (donates electrons) and Lewis acid (accepts electrons.)
Amphiprotic means that molecule can both accept and donate protons. This is different from amphoteric which means that molecule can act as both an acid and a base, but might not necessary involve protons. In the textbook, they gave the example of water as an amphiprotic molecule. Hope this helps!
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