amphoteric compounds

Moderators: Chem_Mod, Chem_Admin

Christineg1G
Posts: 115
Joined: Fri Aug 09, 2019 12:15 am
Been upvoted: 1 time

amphoteric compounds

Postby Christineg1G » Mon Nov 25, 2019 2:46 pm

How would you know that As2O3 and Bi2O3 are amphoteric, while BaO is basic?

Sebastian Lee 1L
Posts: 157
Joined: Fri Aug 09, 2019 12:15 am
Been upvoted: 1 time

Re: amphoteric compounds

Postby Sebastian Lee 1L » Mon Nov 25, 2019 3:35 pm

We know that nonmetal oxides will typically form acidic compounds (ie. H2SO4 or HNO3) and that most metals oxides will form basic compounds (ie. CaO or NaO2). However, amphoteric compounds are ones that can have either acid or base character depending on the reaction. Typically, elements near and along the metalloid diagonal band will form amphoteric compounds because they have both metal and nonmetal characteristics. As2O3 and Bi2O3 are amphoteric because they lie near/on the metalloid diagonal line. Meanwhile BaO is basic because Ba is an alkaline earth metal which if bonded with oxygen, creates a base.

Sydney Myers 4I
Posts: 100
Joined: Fri Aug 09, 2019 12:17 am

Re: amphoteric compounds

Postby Sydney Myers 4I » Mon Nov 25, 2019 10:51 pm

There are certain elements that you have to know will form amphoteric molecules. They are near the metalloids but do not correspond exactly to them.


Return to “Amphoteric Compounds”

Who is online

Users browsing this forum: No registered users and 2 guests