6C.21 Which acid is stronger?

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Marisa Gaitan 2D
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6C.21 Which acid is stronger?

Postby Marisa Gaitan 2D » Wed Dec 09, 2020 4:00 pm

This question asks to compare the strengths of acetic acid, CH3COOH, and formic acid, CH2O2. The stronger acid is formic acid, but I'm confused as to why. I thought acetic acid would be stronger. If anyone could explain their reasoning on this one, I would really appreciate it.

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Re: 6C.21 Which acid is stronger?

Postby Chelsea_Guzman_3C » Wed Dec 09, 2020 4:20 pm

In acetic acid, you have CH3 bonded to COOH, whereas in formic acid, only H is bonded to COOH. The CH3 group in acetic acid has electron-donating properties, which means it is less electron withdrawing power than the H attached to COOH in formic acid. Thus, formic acid is slightly stronger than acetic acid.

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