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Topic: methanoic and benzoic acid  (Read 5446 times)

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icestar

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methanoic and benzoic acid
« on: October 23, 2005, 07:21:25 AM »
Why is methanoic acid more acidic than benzoic acid? I thought the negative charge of COO- would be delocalized into the benzene ring, stabilizing the benzoate ion so it should be more acidic than methanoic acid which doesnt have this delocalization.  
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Offline Mitch

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Re:methanoic and benzoic acid
« Reply #1 on: October 23, 2005, 01:58:23 PM »
What's the pKa of methanoic acid. Benzoic acid is 4.2 in aqueous solution
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Offline Borek

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Re:methanoic and benzoic acid
« Reply #2 on: October 23, 2005, 02:20:21 PM »
3.745
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icestar

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Re:methanoic and benzoic acid
« Reply #3 on: October 24, 2005, 02:55:34 AM »
ya, methanoic's pka is lower. why is this so?
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