Buffers MATERIALS LabQuest LabQuest App Vernier pH Sensor magnetic stirrer and stirring bar three 250 mL beakers 100 mL graduated cylinder 25 mL graduated cylinder balance 0.5 M sodium hydroxide, NaOH, solution two 50 mL burets and two buret clamps 0.5 M hydrochloric acid, HCl, solution 0.1 M acetic acid, HC2H302, solution 1.0 M acetic acid, HC2H302, solution solid sodium acetate, NaC2H302 utility clamp distilled water ring stand PRE-LAB EXERCISE Use the Henderson-Hasselbalch equation to perform the following calculations. The Ka of acetic acid is 1.8 10-5. Review your calculations with your instructor before preparing the buffer solutions. Buffer A: Calculate the mass of solid sodium acetate required to mix with 100.0 mL of 0.1 M acet acid to prepare a pH 4 buffer. Record the mass in your data table. Buffer B: Calculate the mass of solid sodium acetate required to mix with 100.0 mL of 1.0 M acet acid to prepare a pH 4 buffer. Record the mass in your data table