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amphiprotic vs. amphoteric

Posted: Sun Dec 10, 2017 3:57 pm
by Stephanie tran 1J
according to the textbook definition, amphiprotic specifically pertains to water molecules, but I noticed In the homework problems that amphiprotic referred to other compounds as well acting as both proton donors and acceptors; What's the main difference between amphiprotic and amphoteric and is amphiprotic more prevalent to acids and bases?

Re: amphiprotic vs. amphoteric

Posted: Sun Dec 10, 2017 4:42 pm
by Cynthia Tsang
They are similar but amphiprotic is more specific. Amphiprotic is when something can donate or receive a proton. Amphoteric is when something can act as an acid or a base.

Re: amphiprotic vs. amphoteric  [ENDORSED]

Posted: Sun Dec 10, 2017 6:27 pm
by Kyung_Jin_Kim_1H
An example of what Stephanie said would be water. Water is amphoteric because:
Water as a base:
Water as an acid:
In the above reactions, H+ is being donated/accepted. Hence, water is not only amphoteric, but also amphiprotic.
Other examples of amphiprotic compounds are would be and amino acids with carboxyl groups (--COOH) groups.

On the other hand, while Al2O3 reacts with both acids and bases, it cannot by definition be amphiprotic since it doesn't have H.