p-aminophenol and hydrochloric acid reacts 1:1. I believe it's a regular acid-base reaction between the acid and the aminogroup. All you have to figure out is how muc p-aminophenol you have and mix it with the same amount of HCl. Since you mix chemicals yourself, I assume you know how to figure out what the equivalent amounts of your chemicals according to their concentrations.(posted 8309 days ago)