Amphoteric Compiund

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Amphoteric Compiund

Postby Melissa_Aguirre1J » Thu Jun 07, 2018 9:51 am

What is an amphoteric compound?

JooHyun Koh 1H
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Re: Amphoteric Compiund

Postby JooHyun Koh 1H » Thu Jun 07, 2018 1:34 pm

Amphoteric means that it can either function as a base or an acid in a chemical reaction, meaning it can either accept or donate an H+ ion (under the Bronsted definition). One example of an amphoteric compound is water.

For example:
H2O + HCl <--> Cl-- + H3O+
Since H2O accepted a proton, it acts as a base in this reaction. However,
H2O + NH3 <--> OH-- + NH4+
Since H2O donated a proton in this reaction, it acts as an acid in this reaction.
Thus, water is an amphoteric compound because it can act as a base or an acid depending on the context.

There are also the amphoteric compounds the professor mentioned in class that are in between the metal oxides and the nonmetal oxides. These, too, can function as a base or an acid depending on what its reacting with.

Elena 1H
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Re: Amphoteric Compiund

Postby Elena 1H » Mon Jun 11, 2018 1:12 pm

An amphoteric compound can function as an acid or a base depending on whether the other compound in the reaction is an acid or a base. It will act as the opposite of the other compound in the reaction

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