What makes As2O3 Amphoteric?

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Henri_de_Guzman_3L
Posts: 88
Joined: Fri Sep 28, 2018 12:25 am

What makes As2O3 Amphoteric?

Postby Henri_de_Guzman_3L » Fri Dec 07, 2018 12:02 am

On one of the homework questions (I believe it was 6A.17 from the 7th edition) we had to classify As2O3 as basic, acidic, or amphoteric. I know the definition of amphoteric is that it reacts with both acids and bases. My question is how? here is the structure of As2O3
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I can see how it would react with an acid, the H+ ion would bond using one of the lone pairs on the O atoms. How would this compound react with a base?

Henri_de_Guzman_3L
Posts: 88
Joined: Fri Sep 28, 2018 12:25 am

Re: What makes As2O3 Amphoteric?

Postby Henri_de_Guzman_3L » Fri Dec 07, 2018 12:08 am

Aha, I might be getting Amphoteric and Amphiprotic mixed up. As2O3 is NOT Amphiprotic, as it can not donate an H+ ion. It IS Amphoteric because it can react with an acid (such as HCL) or with a base (such as NaOH)

Am I correct in this logic? All amphiprotic substances are amphoteric but not all amphoteric substances are amphiprotic?

Yixiao Hu 3C
Posts: 45
Joined: Fri Sep 28, 2018 12:19 am

Re: What makes As2O3 Amphoteric?

Postby Yixiao Hu 3C » Fri Dec 07, 2018 12:11 am

A substance which can act as either an acid or a base is described as being amphoteric. An amphiprotic substance is one which can both donate hydrogen ions (protons) and also accept them.
As2O3 is amphoteric because As is a metalloid


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