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Postby AKhanna_3H » Sat Dec 07, 2019 9:58 am

This question asks whether the following oxides are acidic, basic, or amphoteric: a. BaO b. SO3 c. As2O3 d. Bi2O3
I understand the definitions of acids, bases, and what it means to be amphoteric, but how do you know what each oxide is?

Ellen Amico 2L
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Joined: Thu Sep 19, 2019 12:16 am

Re: 6A.17

Postby Ellen Amico 2L » Sat Dec 07, 2019 10:05 am

My TA told me these rules:
metals form basic oxides
nonmetals form acidic oxides
elements diagonally from Be to Po and some d-block elements form amphoteric molecules

so for example, SO2 is acidic because S is a nonmetal.

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