Amphoteric vs Polyprotic vs Amphiprotic

[Rosselyn_Machado_2B]

Hi,
Can someone explain the difference between these three please and the influence it has on bonding? I know we went over it in lecture but the concept confused me. Thank you!

[Hannah Cole 3J]

Hi there! Amphoteric substances can act as both acids and bases, with water being a classic example. They possess the ability to donate or accept protons, influenced by reaction conditions. Polyprotic substances, exemplified by sulfuric acid, can donate or accept more than one proton per molecule, involving multiple ionization or deprotonation steps. Amphiprotic substances, often used interchangeably with amphoteric, can both donate and accept protons depending on conditions. Examples include amino acids like glycine. The influence on bonding lies in the flexibility of these substances to engage in proton transfer reactions, impacting their overall chemical behavior, especially in biochemical processes. I hope this helps!