formic acid

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halle young 4A
Posts: 68
Joined: Thu Jul 11, 2019 12:16 am

formic acid

Postby halle young 4A » Sat Dec 07, 2019 9:55 am

why is formic acid a stronger acid than acetic acid?

Ellen Amico 2L
Posts: 101
Joined: Thu Sep 19, 2019 12:16 am

Re: formic acid

Postby Ellen Amico 2L » Sat Dec 07, 2019 10:25 am

The methyl group on acetic acid is electron donating and stabilizes the structure of the compound more, and this also destabilizes the negative charge on the conjugate base. If the conjugate base is less stable, then the corresponding acid is less acidic. Formic acid has a hydrogen attached rather than a methyl group, so this is not electron donating and the conjugate base will be more stable so formic acid will be more acidic.

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