Why methoxy benzoic acid is less acidic than benzoic acid?

Here the +R effect is slightly more than the -I effect. This makes the p- methoxy Benzoic Acid less acidic than Benzoic Acid. Due to +R effect of the -OCH3 Group the carboxylate anion gets less stabilised than in Benzoic acid. So it is less acidic than Benzoic acid.

Which is more acidic methoxy benzoic acid or benzoic acid?

-Since electron-donating groups decrease the acidic strength, $4 – $ methoxy benzoic acid is a weaker acid than benzoic acid. -Also, since electron-withdrawing groups increase the acid strength, therefore, both $4 – $nitrobenzoic acid and $3,4 – $ dinitrobenzoic acid are stronger acids than benzoic acid.

Which is less acidic then benzoic acid?

structures than benzyl carboxylate ion. A : Phenol is less acidic than benzoic acid.

Which is more acidic o hydroxy benzoic acid or m hydroxy benzoic acid?

OH group being both -I and +R group will act as – I group in meta position and will withdraw electron thus decreasing the electron density on COO- and thus its acidity will be more than benzoic acid which has no electron withdrawing effect. So meta-hydroxy benzoic acid is more acidic than benzoic acid.

Why ortho hydroxy benzoic acid is stronger than benzoic acid?

When benzoic acid is substituted by electron-withdrawing groups like nitro (NO2) the acidity increases. When benzoic acid is substituted by electron-donating groups like hydroxyl (OH) the acidity decreases. If the substituent attached to the end of the carbon chain is electron donating, the effect is +I-Effect.

Why ethanoic acid is weaker than benzoic acid?

The ethanoic acid (pKa = 4.76) is weaker acid than benzoic acid (pKa = 4.19 ). Due to the presence of benzene ring in benzoic acid, delocalisation of electron makes it more acidic than ethanoic acid but such stabilization is not present in ethanoic acid.