12.17 How can you determine if an oxide is acidic, basic, or amphoteric

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Adriana Rangel 1A
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Joined: Fri Sep 29, 2017 7:04 am

12.17 How can you determine if an oxide is acidic, basic, or amphoteric

Postby Adriana Rangel 1A » Fri Dec 08, 2017 9:35 pm

Ok so I understand that:
-An acidic oxide is an oxide that reacts with water to form a solution of a Bronstead acid. (Co2+ H2CO3)
-A basic oxide is an oxide that reacts with water to form a solution of hydroxide ions
-Amphoteric are substances that react with both bases and acids

How can I determine which ones are which though such as in 12.17a_
a) BaO
b) SO3
c) As2O3
d)Bi2 O3

Kelly Kiremidjian 1C
Posts: 62
Joined: Fri Sep 29, 2017 7:04 am

Re: 12.17 How can you determine if an oxide is acidic, basic, or amphoteric

Postby Kelly Kiremidjian 1C » Fri Dec 08, 2017 9:56 pm

ad trouble with this question too. Reading page 468-469 in the textbook really helped me. It says at the end of section 12.3:

metals form basic oxides, nonmetals form acidic oxides, and the elements on a diagonal line from beryllium to polonium and several d-block metals form amphoteric oxides.

Therefore:
a) BaO would be basic because is a metal
b) SO3 would be acidic because S is a non-metal
c)As2O3 is amphoteric because As is in the diagonal line
d)Bi2O3 is also amphoteric because Bi is in the diagonal line

Hope this helps


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