a. Benzoic acid has a pKa-4.2 and 4-hydroxybenzoic acid has a pKa 4.6. resonance structures for…

a. Benzoic acid has a pKa-4.2 and 4-hydroxybenzoic acid has a pKa 4.6. resonance structures for 4-hydroxybenzoic acid and use these to explain why the 4-hydroxy group decreases the stability of the conjugate base of 4-hydroxybenzoic acid relative to benzoic acid. Draw 4. OH OH OH OH OH benzoic acicd pKa = 4.2 4-hydroxybenzoic acid pKa = 4.6 2-hydroxybenzoic acid pKa-2.9 b. Unlike 4-hydroxybenzoic acid, 2-hydroxybenzoic acid (pKa 2.9) increases the acidity of benzoic acid. Explain.