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6A.17

Posted: Sun Dec 01, 2019 10:12 pm
by Shanzey
How are we able to tell that As2O3 and Bi2O3 are amphoteric compounds? I drew the Lewis structure for the compound, but I do not understand how we can tell that they possess both acidic and basic abilities.

Re: 6A.17

Posted: Sun Dec 01, 2019 10:16 pm
by saigorijavolu2k
Amphoteric compounds are compounds that can react as an acid and base. If you react them with water, there would be 2 reactions. If you write this out then you can tell. Also it is general pattern. There is chart in the textbook which can help.

Re: 6A.17

Posted: Mon Dec 02, 2019 7:10 pm
by Ruby Tang 2J
In general, metal oxides tend to act as bases while nonmetal oxides tend to act as acids. The oxides of elements on or near the diagonal metalloid line going down the periodic table have relatively equal acidic and basic character, so they are considered amphoteric.

Re: 6A.17

Posted: Wed Dec 04, 2019 9:26 pm
by erica thompson 4I
saigorijavolu33J wrote:Amphoteric compounds are compounds that can react as an acid and base. If you react them with water, there would be 2 reactions. If you write this out then you can tell. Also it is general pattern. There is chart in the textbook which can help.


Where is this chart in the textbook???

Re: 6A.17

Posted: Wed Dec 04, 2019 10:31 pm
by Melvin Reputana 1L
The chart is on the left side of page 450 in the textbook. It is called Figure 6A.7.

Re: 6A.17

Posted: Thu Dec 05, 2019 2:05 am
by Princess Jereza 3C
Amphoteric compounds are compounds with characteristics of acids and bases, and metals/metalloids can form amphoteric compounds with oxygen because they can possess different oxidation states. In 6A.17, As2O3 & Bi2O3 are amphoteric because of the arsenic and bismuth metals. I hope this helps!