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405404782 Gabriel Rigole 4F
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Postby 405404782 Gabriel Rigole 4F » Sun Dec 08, 2019 9:40 pm

How can you tell if a molecule is amphoteric?

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Re: amphoteric

Postby Jared_Yuge » Sun Dec 08, 2019 9:43 pm

if the molecule in question is able to both accept a proton and give a proton then it is amphoteric as a general rule.

Miriam Villarreal 1J
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Re: amphoteric

Postby Miriam Villarreal 1J » Sun Dec 08, 2019 11:26 pm

Can react as a base and acid and examples include amino acids and proteins, which have amine and carboxylic acid groups, and self-ionizable compounds such as water.

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Re: amphoteric

Postby SVajragiri_1C » Sun Dec 08, 2019 11:32 pm

A molecule is amphoteric if it can react as an acid or a base in an acid-base reaction.

Louise Lin 2B
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Re: amphoteric

Postby Louise Lin 2B » Sun Dec 08, 2019 11:33 pm

adding on to the above replies, an example of a common amphoteric molecule is water. Water can act as either an acid or base depending on the reactions.

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Re: amphoteric

Postby Mulin_Li_2J » Sun Dec 08, 2019 11:35 pm

Amphoteric and amphiprotic are two terms easily confused together. Amphoteric describes any molecules with both acidic and basic properties. As a very general definition, acidic and basic properties here can refer to any acids and bases definitions, including Lewis, Bronsted, etc. On the other hand, Amphiprotic describes molecules being a proton donor and a proton acceptor at the same time. As you can see, this definition fits specifically into the definition of Lewis acids and bases, compared to the more broad definition of amphoteric.

In short, amphiprotic molecules are specific cases of amphoteric molecules because amphiprotic molecules are specifically Lewis acids and bases.

Serena Siddiq 3D
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Re: amphoteric

Postby Serena Siddiq 3D » Mon Dec 09, 2019 3:10 am

To add onto the last answer, something that is amphiprotic (can give off an H+ or accept it) will be amphoteric (in reactions could act as acid and a base) but it wont be true the other way around.

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Re: amphoteric

Postby VLi_2B » Mon Dec 09, 2019 9:37 am

All amphiprotic species must be amphoteric, but the converse is not true.

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