Stronger acids and stability?

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Melody Haratian 2J
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Stronger acids and stability?

Postby Melody Haratian 2J » Sat Dec 12, 2020 7:24 pm

Hi guys!
I’ve been a little confused on this but for acids, are stronger acids more or less stable? Would electron withdrawing in an acid make it stable or not?
Thanks!

Hannah Biju 1E
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Re: Stronger acids and stability?

Postby Hannah Biju 1E » Sat Dec 12, 2020 7:29 pm

Stronger acids have more stable conjugate bases, so a more electronegative electron-withdrawing atom would stabilize the conjugate base more than a less electronegative electron-withdrawing atom, making the acid with a more electronegative electron-withdrawing atom the stronger acid.

Isabelle Hales 1J
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Re: Stronger acids and stability?

Postby Isabelle Hales 1J » Sat Dec 12, 2020 7:34 pm

Hi! In Lec #27, Lavelle discussed the properties that make an acid strong or weak. Strong acids lose protons easily, thus they have weaker/longer A-H bonds because the H+ is easier to remove. Additionally, a stronger acid will have a more stable resulting anion as the acid is more likely to lose the H+. If the anion has an atom with more electron-withdrawing (and resonance), it will be more stable and thus a stronger acid. Hope this helps.

Sana Nagori 2H
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Re: Stronger acids and stability?

Postby Sana Nagori 2H » Sat Dec 12, 2020 8:13 pm

stronger acids are more stable after they have lost their H+. If a molecule loses a proton and is stable it is less likely to want to pick one up again and therefore will stay completely deprotenated so that's why a stronger acid will have a more stable conjugate base!

Griffin G
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Re: Stronger acids and stability?

Postby Griffin G » Thu Dec 17, 2020 1:46 am

Strong acids want to give up their proton more willingly. So, I suppose its possible to say that weak acids have a more stable structure because they are less willing to surrender a proton.

Adam_ElSayed_3B
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Re: Stronger acids and stability?

Postby Adam_ElSayed_3B » Thu Dec 17, 2020 2:26 am

Stronger acids aren't stable, as they're likely to act as an acid and react. However, their conjugate bases are rather stable.


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