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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: w451208 on October 18, 2010, 08:53:47 PM

Title: Relative acid-base strengths
Post by: w451208 on October 18, 2010, 08:53:47 PM

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Why is the answer to this not C?

Title: Re: Relative acid-base strengths
Post by: MissPhosgene on October 18, 2010, 09:24:18 PM

Fluorine is more electronegative than bromine. It inductively withdraws electron density more effectively.

Title: Re: Relative acid-base strengths
Post by: orgopete on October 20, 2010, 09:12:16 AM

That is a good question. Could anyone post the pKa's for 3-F, Cl, Br, and I-propanoic acid? I tried searching in Google, but I couldn't find anything. The fluoroacetic acids are reverse the acidity of the ethanols. What does happen with propanoic acid?