HCOOH vs CH3COOH

Acidity
Basicity
The Conjugate Seesaw

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Emily Glaser 1F
Posts: 156
Joined: Thu Jul 27, 2017 3:01 am

HCOOH vs CH3COOH

Postby Emily Glaser 1F » Tue Dec 05, 2017 3:56 pm

Let's say I was not given the Ka constants of these molecules. How would I determine which one is a stronger acid. Why is HCOOH stronger?

Annalise Eder 2L
Posts: 49
Joined: Sat Jul 22, 2017 3:01 am

Re: HCOOH vs CH3COOH

Postby Annalise Eder 2L » Tue Dec 05, 2017 4:04 pm

HCOOH is a slightly stronger acid than CH3COOH because H is slightly more electronegative than the CH3 group. A stronger acid forms a more stable anion when it dissociates and HCOO is more stable than CH3COO.

Jingyi Li 2C
Posts: 56
Joined: Fri Sep 29, 2017 7:06 am

Re: HCOOH vs CH3COOH

Postby Jingyi Li 2C » Tue Dec 05, 2017 5:14 pm

Another explanation is that the CH3 group pushes electrons towards the O-H bond, making the bond stronger and thus the acid weaker. Therefore, CH3COOH is slightly weaker than HCOOH.


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