The OH group bonding with the carbonyl group has a pKa around 5, and the OH group connected ortho of the carbonyl group has a pKa around 10.
Added correction:
Salicylic acid is a monoprotic, not a diprotic acid in water.
From wikipedia table value: pKa 2.97
The -COOH (carboxylic acid) and the -OH (phenolic) hydrogens
It is slightly basic. Behaves almost completely neutral.
Amino acid
Because it is a lewis acid. It can accept a pair of electrons
Salicylic acid contains carbon, hydrogen, and oxygen.
Salicylic acid is a solid at room temperature.
It is slightly basic. Behaves almost completely neutral.
Most acne washes have salicylic acid or benzoyl peroxide. Salicylic Acid has 7 carbons, 6 Hydrogens, and 3 Oxygens. Salicylic Acid is also called 2-Hydroxybenzoic Acid. Benzoyl Peroxide has 14 Carbons, 10 Hydrogens, and 4 Oxygens. Benzoyl Peroxide is also called dibenzoyl peroxide. I hope this is what your looking for.
It is not understood by what you mean by ' reverse' . CuSO4 (Copper sulphate) is an entirely different chemical to salicylic acid. CuSO4 is a blue soluble inorganic solid salt. Salicylic Acid ( 2-hydroxybenzoic acid) is a white crystalline mildly soluble and mildly acidic organic acid .
Amino acid
Because it is a lewis acid. It can accept a pair of electrons
Salicylic acid contains carbon, hydrogen, and oxygen.
You can find Salicylic Acid in a lot of Acne medications.
Salicylic acid is a solid at room temperature.
take 276 gm of salicylic acid in 1000 ml water to prepare 2M solution of the salicylic acid.
Salicylic acid i would think Look at both their structures; salicylic acid has more polar -OH bonds
Salicylic acid, like any other acid, would be dissolved in water.
salicylic acid is the sublimate, the residue is the sodium sulfate