Write out the reaction between ethyl 4-aminobenzoate and hydrochloric acid.

The reaction between ethyl 4-aminobenzoate and hydrochloric acid is an acid-base reaction that results in the formation of a salt and water. The balanced chemical equation for this reaction is:

C8H9NO2 + HCl -> C8H8ClNO2 + H2O

In this equation, ethyl 4-aminobenzoate (C8H9NO2) is the reactant, and hydrochloric acid (HCl) is the acid. The products of the reaction are a salt (C8H8ClNO2) and water (H2O).

In the reaction, the hydrochloric acid donates a proton (H+) to the amine group of the ethyl 4-aminobenzoate, resulting in the formation of the salt and water. The salt is a derivative of 4-aminobenzoic acid, with the ethyl group replaced by a chlorine atom.

This reaction is an example of a hydrolysis reaction, in which a compound is broken down by the addition of water. It is also an example of a nucleophilic substitution reaction, in which a nucleophile (in this case, the amine group of the ethyl 4-aminobenzoate) is substituted for another atom or group.