Example of Acetic Acid as a weak acid

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Jessa Maheras 4F
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Example of Acetic Acid as a weak acid

Postby Jessa Maheras 4F » Sun Nov 24, 2019 9:06 pm

The textbook provides an example of a weak acid as acetic acid, on pg. F75. After providing a chemical equation for the Acid-Base reaction, the textbook claims that "only a small fraction of its molecules undergo deprotonation". Why does only a small fraction of acetic acid undergo deprotonation? How does this tell us whether it is a weak or strong acid?

Julie Park 1G
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Re: Example of Acetic Acid as a weak acid

Postby Julie Park 1G » Sun Nov 24, 2019 9:47 pm

I believe that the deprotonation has to do with the ability of weak/strong acids to dissociate. Weak acids, such as acetic acids, are known to not dissociate completely while strong acids can dissociate fully in water/aqueous solutions. This means that strong acids can ionize and release a lot of protons (aka deprotonate) while weak acids will release lesser amounts of protons (H+).

Aadil Rehan 1D
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Re: Example of Acetic Acid as a weak acid

Postby Aadil Rehan 1D » Sun Nov 24, 2019 11:40 pm

You can also think of as the acetate anion, CH3COO-, is not very stable, and prefers being the acid form, CH3COOH. Whereas the strong acids have a stable conjugate base.

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