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formic acid

Posted: Sat Dec 07, 2019 9:55 am
by halle young 4A
why is formic acid a stronger acid than acetic acid?

Re: formic acid

Posted: Sat Dec 07, 2019 10:25 am
by Ellen Amico 2L
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.