1. The problem statement, all variables and given/known data What is the % glycolic acid needed to replace 40% phosphoric acid (assuming it is weight%)? 2. Relevant equations 3. The attempt at a solution I tried to solve this by first converting the Phosphoric acid weight% to mol/L for the phosphoric acid (5.11 mol/L).. Since phosphoric acid is triprotic, I just multiply by 3 the calculated Molarity of phosphoric acid for the molarity of glycolic acid ... I am not sure if i did it right...how do we find the answer?