Aspirin (acetyl salicyclic acid, molar mass = 180 g mol-1) used as analgesic has pKa value of 2. Two tablets of aspirin each weighing 90 mg are dissolved in 100 mL of water. The pH of the solution is Share with your friends Share 0 Ahhh...ho answered this There is not necessary that 2 tablets change the pH value... -1 View Full Answer