Determining Acidity

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Saachi_Kotia_4E
Posts: 68
Joined: Fri Sep 28, 2018 12:23 am

Determining Acidity

Postby Saachi_Kotia_4E » Tue Dec 04, 2018 1:05 pm

How do you determine how acidic an acid is? for example, if you had to put HClO3, HClO, HClO2, and HClO4 in order from least to most acidic, how would you go about doing that? how would you do it for bases?

jonathanjchang2E
Posts: 61
Joined: Fri Sep 28, 2018 12:26 am

Re: Determining Acidity

Postby jonathanjchang2E » Tue Dec 04, 2018 2:29 pm

For your example problem, anything that weakens the O-H bond would cause the molecule to be a stronger acid. So the answer would be HClO<HClO2<HClO3<HClO4 due to the impact the added oxygen atoms have on the O-H bond. This is generally the same idea with bases as molecules that dissociate more easily are stronger acids/bases.

Sameen Mahmood 3D
Posts: 37
Joined: Wed Jun 13, 2018 3:00 am

Re: Determining Acidity

Postby Sameen Mahmood 3D » Tue Dec 04, 2018 2:32 pm

Whichever molecule is the easiest to break (easiest to remove H+) is the most acidic.

kamalkolluri
Posts: 65
Joined: Fri Sep 28, 2018 12:17 am
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Re: Determining Acidity

Postby kamalkolluri » Tue Dec 04, 2018 2:50 pm

Another thing we learned in class is the stability of the ion when it is broken from the H. So ClO4 is the strongest because it has more oxygens, and hence, more resonance, making the ion stronger than the others.


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