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Grade 12th passOrganic Chemistry

What is the Resion of benzoic acid is weaker then formic acid

Profile image of jeetesh patel
6 Years agoGrade 12th pass
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2 Answers

Profile image of jeetesh patel
6 Years ago
Benzoic acid can act as both weak electron donating and electron withdrawing group. As carboxylate has two oxygen atom benzene act as weak electron donating group. Therefore acidity of benzoic acid is weaker than formic acid. The pka value of formic acid is 3.77 while that of benzoic acid is 4.202
Profile image of Vikas TU
6 Years ago
Dear student 
Formic acid is stronger than benzoic acid because it has a lower pKa value (formic acid pKa = 3.751; benzoic acid pKa = 4.204
Hope this will help 
Good Luck 

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