amphiprotic vs amphoteric

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rachel liu 3k
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Joined: Sat Aug 17, 2019 12:16 am

amphiprotic vs amphoteric

Postby rachel liu 3k » Sat Dec 07, 2019 11:28 pm

please quote this question so i get a notification. thanks in advance!
what are some molecules that are amphoteric but not amphiprotic? do we need to know molecules that fall into one category but not the other?

EthanPham_1G
Posts: 104
Joined: Sat Jul 20, 2019 12:17 am

Re: amphiprotic vs amphoteric

Postby EthanPham_1G » Sat Dec 07, 2019 11:53 pm

what are some molecules that are amphoteric but not amphiprotic? do we need to know molecules that fall into one category but not the other?

Amphiprotic molecules are all amphoteric, but not all amphoteric molecules are amphiprotic if that makes sense.

Amphiprotic means that it can either donate or receive a H+ proton, following the Bronsted definition. So according to the Bronsted definition, it can act as either an acid or a base because it can donate or receive a H+ proton.

Amphoteric only means that the molecule can act as either an acid or a base. It regards BOTH the Lewis definition and the Bronsted definition. AlO2 is an example of an amphoteric compound that is not amphiprotic. It follows the Lewis definition for both an acid and a base, but it does not apply to the Bronsted definition because it has no H+ protons.


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