Describe an alternate method for determining the molar concentration of your

Describe an alternate method for determining the

This preview shows page 40 - 43 out of 68 pages.

1. Describe an alternate method for determining the molar concentration of your unknown sample of copper (II) sulfate solution, using the standard data.
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CHM2046C Buffers Spring 2016 P a g e | 42MATERIALS LabQuest 0.5 M sodium hydroxide, NaOH, solution LabQuest App two 50 mL burets and two buret clamps Vernier pH Sensor 0.5 M hydrochloric acid, HCl, solution magnetic stirrer and stirring bar 0.1 M acetic acid, HC2H3O2, solution three 250 mL beakers 1.0 M acetic acid, HC2H3O2, solution 100 mL graduated cylinder solid sodium acetate, NaC2H3O225 mL graduated cylinder utility clamp balance distilled water ring stand PRE-LAB EXERCISE Use the Henderson-Hasselbalch equation to perform the following calculations. The Ka of acetic acid is 1.8 105. 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 acetic 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 acetic acid to prepare a pH 4 buffer. Record the mass in your data table. PROCEDURE Part I Prepare and Test Buffer Solution A 1. Obtain and wear goggles.
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  • Spring '19
  • pH, Sodium hydroxide, Test Tube, LabQuest

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