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11 Nov 2019
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
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
Deanna HettingerLv2
20 Jun 2019