How to tell As2O3 or Bi2O3 is amphoteric?

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How to tell As2O3 or Bi2O3 is amphoteric?

Postby Chem_Mod » Mon Aug 29, 2011 12:26 am

How can you tell that As2O3 or Bi2O3 is amphoteric?

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Re: How to tell As2O3 or Bi2O3 is amphoteric?

Postby Chem_Mod » Mon Aug 29, 2011 12:26 am

To be amphoteric means that the oxide can react either with acid or base. In the case of As2O3 we have: As2O3 + 6HCl --> 2AsCl3 + 3H2O (reaction with acid) NaOH + As2O3 + 3H2O --> 2Na[As(OH)4] (reaction with base) Something similar would apply to Bi2O3.

dissolves in both acidic and basic solution. With acid: . With base: .


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