Final answer:
The formula for the solubility of ethyl 4-aminobenzoate in water is [A1³+] = (2 x 10^-32/27) = 5 x 10^-9 M.
Step-by-step explanation:
The formula for the solubility of ethyl 4-aminobenzoate in water can be represented using the concept of molar solubility. Molar solubility is the number of moles of a solute that can be dissolved in a liter of solvent. In this case, the molar solubility of ethyl 4-aminobenzoate in water is represented as [A1³+], where the concentration is given in mole per liter (M). The formula for the solubility is represented as [A1³+] = (2 x 10^-32/27) = 5 x 10^-9 M.