What solid forms when sulfuric acid is added to a reaction mixture of p-aminobenzoic acid and absolute ethanol?

I think you will form the ester between the benzoic acid and the ethanol. In addition, I think the amino group will form the ammonium salt with the acid.

+^H3N-Ar-COOEt should be the solid.

To determine the solid formed when sulfuric acid is added to a reaction mixture of p-aminobenzoic acid and absolute ethanol, we need to understand the chemical reactions involved.

In this case, the reaction between p-aminobenzoic acid and absolute ethanol is an esterification reaction. The reactants form an ester called ethyl p-aminobenzoate, along with water as a byproduct. The balanced chemical equation is:

p-aminobenzoic acid + absolute ethanol → ethyl p-aminobenzoate + water

C7H7NO2 + C2H5OH → C9H11NO2 + H2O

Now, when sulfuric acid is added to the reaction mixture, it acts as a catalyst. It helps in activating the reaction and increasing the reaction rate. Sulfuric acid does not directly participate in the reaction or produce any solids.

Therefore, when sulfuric acid is added to the reaction mixture of p-aminobenzoic acid and absolute ethanol, no new solid forms. The reaction primarily leads to the formation of ethyl p-aminobenzoate (the ester) and water.