Benzoic acid is a weak acid since it is an organic acid.
Acid signifies that it leaves protons in an aqueous solution.
The acid is stronger when the proton-leaving rate is high.
Benzoic acid is more strongly acidic than 2-Naphthol due to the high amount of Hydrogen () ion donation. Benzoic acid can donate with ease because benzoate ion formed is resonance stabilised.
In most cases, acidic organic molecules are extracted as using an aqueous inorganic base solution.
Both benzoic acid (a carboxylic acid) and 2-Naphthol (a weak acid) are ionized into salt in the presence of , which is a solid inorganic base.
Hence, Benzoic acid is the strongest acid than 2-Naphthol.
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