Q.no28 can anyone explain
Dear Student,
As you can see the pKa values of all the compounds and pKa value is inversely proportional to the acidity. Therefore, most acidic is CH3COOH with the lowest pKa value of 4.76. The lower pKa value and higher acidity of acetic acid are due to the carboxylate ion which is more resonance stabilised and shows greater polarity and protonation tendency.
Regards
As you can see the pKa values of all the compounds and pKa value is inversely proportional to the acidity. Therefore, most acidic is CH3COOH with the lowest pKa value of 4.76. The lower pKa value and higher acidity of acetic acid are due to the carboxylate ion which is more resonance stabilised and shows greater polarity and protonation tendency.
Regards