Ethyl 4-aminobenzoate is an organic compound that is insoluble in water in basic and neutral solutions but becomes soluble in acidic environments due to the protonation of its amino group, forming a charged salt. In 1.0 M HCl, it is soluble, while in 1.0 M NaOH and water, it is insoluble. This behavior is typical of many organic salts.

1. Ethyl 4-aminobenzoate is a basic organic compound. In basic and neutral solutions, it will be
insoluble in water. However, in acidic solutions, the amino group will be protonated, formed a
charged salt species. As with normal salts, this is water-soluble. So; 1.0 M HCl: soluble 1.0 M
NaOH and Water: insoluble.
Solution
Ethyl 4-aminobenzoate is a basic organic compound. In basic and neutral solutions, it will be
insoluble in water. However, in acidic solutions, the amino group will be protonated, formed a
charged salt species. As with normal salts, this is water-soluble. So; 1.0 M HCl: soluble 1.0 M
NaOH and Water: insoluble.