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Alma Carrera 3C
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Joined: Fri Apr 06, 2018 11:02 am


Postby Alma Carrera 3C » Sat Dec 08, 2018 6:09 pm

Why would As2O3 be considered amphoteric? Can someone show me a chemical equation in which it acts as both an acid and a base?

Austin Clack
Posts: 29
Joined: Fri Sep 28, 2018 12:17 am

Re: As2O3

Postby Austin Clack » Sat Dec 08, 2018 6:16 pm

Arsenic(III) Oxide (As2O3) is amphoteric because it behaves as both an acid and base in different circumstances. It dissolves in dilute hydrochloric acid forming arsenic trichloride.

As2O3 + 6HCl= 2AsCl3 + 3H2O

It also dissolves in warm alkalis with formation of salts known as arsenites.

As2O3 + 6NaOH = 2Na3AsO3 + 3H2O

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