To a 25.00mL volumetric flask, a lab technician adds a 0.175g sample of a weak monoprotic acid, HA, and dilutes to the mark with distilled water. The technician then titrates this weak acid solution with 0.0973MKOH. She reaches the endpoint after adding 45.51mL of the KOH solution. Determine the number of moles of the weak acid in the solution. moles of weak acid: mol Determine the molar mass of the weak acid. molar mass = g/mol After the technician adds 15.89mL of the KOH solution, the pH of the mixture is 5.33. Determine the pKa of the weak acid. pKa