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What makes a carboxylic acid more acidic?

The presence of such groups near the COOH group of a carboxylic acid often has an effect on the acidity. In general, electron-withdrawing groups increase acidity by increasing the stability of the carboxylate ion. In contrast, electron-donating groups decrease acidity by destabilizing the carboxylate ion.

Which one of the following carboxylic acid is most acidic?

Upon protonation, the charge can also be delocalized by resonance. However, carboxylic acids are, in fact, less basic than simple ketones or aldehydes. Moreover, although carbonic acid (HO-COOH) is more acidic than acetic acid, it is less basic.

Which among the following is most acidic?

Hence, p−nitrophenol is most acidic among the given.

Which is the strongest phenol?

In ‘D’ the NO2 groups is flasked by two -CH3 groups which push the NO2 group out of plane of the benzene ring. As a result of this steric hinderance, the electron withdrawing resonance effect of the -NO2 group will be reduced and as such ‘D’ will be a weaker acid than ‘B’. Therefore ‘B’ is the strongest acid.

Which is more acidic phenol or alcohol and why?

Phenol is more acidic than alcohols due to stabilisation of phenoxide ion through resonance. Presence of electron withdrawing group increases the acidity of phenol by , stabilising phenoxide ion while presence of electron releasing group decreases the acidity of phenol by destabilising phenoxide ion.

Why carboxylic acid is more acidic than phenol and alcohol?

As discussed above, carboxylate ion, the conjugate base of a carboxylic acid is stabilized by two equivalent resonance structures in which the negative charge is effectively delocalized between two more electronegative oxygen atoms. Hence, the carboxylic acids are more acidic than phenols.

Why are alcohols weaker acid than water?

In alcohol , the alkyl group has +I effect. It increases the electron density on the oxygen atom. As a result, the release of H+ ion from alcohol is more difficult than from water or alcohol is a weaker acid.

Are alkynes more acidic than alcohols?

ANSWER : Alcohol is more acidic than alkynes. For alcohols of H+ is removed O- is formed, which is more stable than C- formed in alkynes if H+ is removed. Because electronegativity of oxygen is greater than carbon.