Data Data Table 1 Vinegar Sample 1 Vinegar Sample 2 Vinegar Sample 3 Mass of

Data data table 1 vinegar sample 1 vinegar sample 2

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Data Data Table 1 Vinegar Sample 1 Vinegar Sample 2 Vinegar Sample 3 Mass of Vinegar 4.90 g 4.83 g 5.00 g Volume of Vinegar mL Density = 1.005 g/mL 4.88 mL 4.8 mL 4.98 mL Initial NaOH volume in syringe 8.9 mL 9.5 mL 9.0 mL Final NaOH volume in syringe 4.1 mL 4.5 mL 4.3 mL Volume of NaOH Delivered 4.8 mL 5.0 mL 4.7 mL Moles of NaOH Delivered 0.0048 mol 0.0050 mol 0.0047 mol Moles of Acetic Acid in Sample 0.0048 mol 0.0050 mol 0.0047 mol Mass of Acetic Acid in Sample 0.288 g 0.300 g 0.282 g Calculated Molarity of Acetic Acid in the sampled vinegar 0.98 M 1.0 M 0.94 M Calculated Percent Mass of Acetic Acid in sampled vinegar 5.9 % 6.2 % 5.6 % Average Calculated Percent Mass of Acetic Acid in Sampled Vinegar 5.9 % Activity 2 (Titration of Apple Cider Vinegar Sample with Sodium Hydroxide) Method Activity 2 is an inquiry-based activity to demonstrate the learned technique of determining the acetic acid concentration in vinegar to a vinegar sample from your home. Each type of vinegar has a slightly different concentration of acetic acid. This activity requires the selection of a vinegar product from your home, a friend’s home, or a local restaurant. Only about a teaspoon of 3
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vinegar is needed. Attempt to find a different type of vinegar such as cider, malt, or balsamic vinegar. The vinegar included in this kit is white vinegar. Different brands of vinegar may also contain different amounts of acetic acid. Use the same procedure and data table to determine the acetic acid content in your vinegar sample. Data Data Table 2 Vinegar Sample 1 Vinegar Sample 2 Vinegar Sample 3 Mass of Vinegar 4.82 g 4.84 g 4.90 g Volume of Vinegar mL Density = 1.005 g/mL 4.80 mL 4.82 mL 4.88 mL Initial NaOH volume in syringe 9.2 mL 10.0 mL 9.8 mL Final NaOH volume in syringe 5.6 mL 6.2 mL 5.8 mL Volume of NaOH Delivered 3.6 mL 3.8 mL 4.0 mL Moles of NaOH Delivered 0.0036 mol 0.0038 mol 0.0040 mol Moles of Acetic Acid in Sample 0.0036 mol 0.0038 mol 0.0040 mol Mass of Acetic Acid in Sample 0.216 g 0.228 g 0.240 g Calculated Molarity of Acetic Acid in the sampled vinegar 0.75 M 0.79 M 0.82 M Calculated Percent Mass of Acetic Acid in sampled vinegar 4.5 % 4.7 % 4.9 % Average Calculated Percent Mass of Acetic Acid in Sampled Vinegar 4.7 % Activity 3 (Calculations of pK a from Sample Lab Data) Method Review the lab data found in Data Table 3. This is from a titration of a vinegar sample using a pH meter. Determine the volume of 0.1M NaOH consumed during the titration. Record the answer and then calculate the Molarity of the Acetic Acid in the vinegar samples. Record the 4
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