How can you tell if an acid/base is polyprotic?

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Ananta3G
Posts: 62
Joined: Wed Sep 18, 2019 12:19 am

How can you tell if an acid/base is polyprotic?

Postby Ananta3G » Wed Dec 04, 2019 10:31 am

Hi! How does one tell if an acid/base is polyprotic? Can someone give me some examples of acids and bases that meet these conditions? Thanks!

Ashley Tran 2I
Posts: 68
Joined: Thu Jul 11, 2019 12:17 am

Re: How can you tell if an acid/base is polyprotic?

Postby Ashley Tran 2I » Wed Dec 04, 2019 11:01 am

You can tell if something is a polyphonic acid if it has more than one H+ cation. For example H2S,H2SO4,H3PO4.

Polyphonic bases can accept more than one proton. It can be recognized by compounds with cations of a greater than +1 charge. This is because OH- is -1 so if the cation is more than +1 we need more OH- to balance out the charge. For example, Mg(OH)2, Ca(OH)2, etc.

Ying Yan 1F
Posts: 56
Joined: Fri Aug 02, 2019 12:16 am

Re: How can you tell if an acid/base is polyprotic?

Postby Ying Yan 1F » Fri Dec 06, 2019 7:09 pm

Usually, if a molecule has more than one hydrogen molecule, it means it is polyprotic (I.e. H2SO4) since it shows that they are able to donate more than one proton. As for polyprotic bases, they are able to accept more than one protons, therefore, you can look out for those when you see a molecule with > 1+ charge. Hope that helps!

Shrayes Raman
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Joined: Sat Jul 20, 2019 12:15 am

Re: How can you tell if an acid/base is polyprotic?

Postby Shrayes Raman » Sun Dec 08, 2019 12:08 am

Molecules that have more than H+ tend to be polyprotic more often than not, especially when in the front of the name ie H2S04

Lauren Sanchez 3D
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Joined: Sat Aug 24, 2019 12:17 am

Re: How can you tell if an acid/base is polyprotic?

Postby Lauren Sanchez 3D » Sun Dec 08, 2019 12:57 am

I remember hearing about the term amphiprotic. What is the difference between amphiprotic and polyprotic?

Ananta3G
Posts: 62
Joined: Wed Sep 18, 2019 12:19 am

Re: How can you tell if an acid/base is polyprotic?

Postby Ananta3G » Sun Dec 08, 2019 9:59 am

Lauren Sanchez 3D wrote:I remember hearing about the term amphiprotic. What is the difference between amphiprotic and polyprotic?



polyprotic is the ability of an acid to donate multiple protons (H+) while amphiprotic means a substance can act as an acid and a base.


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