Pepsin is the name given to a mix of several digestive enzymes, secreted as larger precursor proteins by glands that line the stomach. These glands also secrete hydrochloric acid, which dissolves the particulate matter in food, allowing pepsin to enzymatically cleave individual protein molecules. Chyme, the resulting mixture of food, HCL, and digestive enzymes, has a PH 1.5. Estimate the PI