Amphoteric and amphiprotic compounds

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Deborah Cheng 1F
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Joined: Thu Jul 13, 2017 3:00 am

Amphoteric and amphiprotic compounds

Postby Deborah Cheng 1F » Sat Dec 02, 2017 5:06 pm

What is the difference between amphoteric and amphiprotic compounds?

miznaakbar
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Re: Amphoteric and amphiprotic compounds

Postby miznaakbar » Sat Dec 02, 2017 5:13 pm

Amphoteric substances can act as either an acid or a base whereas an amphiprotic substance can donate and accept hydrogen ions. Some but not all amphoteric substances are amphiprotic, for example page 429 of the textbook explains this well:
"Distinguish between amphoteric and amphiprotic. Aluminum metal is amphoteric (it reacts with both acids and bases), but it has no hydrogen atoms to donate as protons, and its not amphiprotic"

Christy Zhao 1H
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Joined: Fri Sep 29, 2017 7:07 am

Re: Amphoteric and amphiprotic compounds

Postby Christy Zhao 1H » Sat Dec 02, 2017 11:48 pm

An amphiprotic example would be water since there are hydrogen atoms and is able to donate a proton, and the oxygen has lone pairs and is able to accept a proton.

Ramya Natarajan 1D
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Re: Amphoteric and amphiprotic compounds

Postby Ramya Natarajan 1D » Tue Dec 05, 2017 1:32 pm

To make sure you don't get them confused, I'd just look at the suffixes of each. In Amphiprotic molecules, the protons are able to be transferred and taken away to both a conjugate acid and base. An amphoteric molecule is simply able to react with both an acid and a base, but isn't necessarily one under the Bronsted definition.

Elizabeth Bamishaye 2I
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Re: Amphoteric and amphiprotic compounds

Postby Elizabeth Bamishaye 2I » Tue Dec 05, 2017 3:29 pm

Amphoteric compounds have both basic and acidic character, and the prime example of this is water.
Amphiprotic is a molecule that can act as a proton donor or proton acceptor.


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