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Salt= base рка-рн Questions 1. Prepare a graph of pH versus cumulative volume of 0.1M NaOH added using Excel. Label pkal, pKa2 and equivalence points 1 and 2. Print out a copy and turn it in. If you recorded your data directly into Excel, also include a copy of your data. 2. Use your graph to complete the table: Volume at first equivalence point 1.8mL Volume halfway to first equivalence point 0.8mL pKa 1 2.78 Volume at second equivalence point 2.2mL Volume at half of equivalence point 2 1.1mL 3. What is the density of the cola? Show all of your work. molarity of NaOH-0.1523M Vi=10.0 mL pka 2 2.93 0 4. Using the first equivalence point, calculate the molarity of the phosphoric acid in the cola sample. Show all of your work.
H 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5 5.1 5.2 5.3 5.4 5.5 6.63 6.7 6.83 6.97 6.99 7.07 7.18 7.33 7.48 7.74 7.99 8.17 8.4 8.5 8.66 8.83 8.98 9.12 9.18 9.28 9.39 9.46 9.52 9.59 9.62 9.67 9.68 9.75 12 10 5.6 5.7 5.8 5.9 6 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7 7.1 9.74 9.76 9.79 9.84 9.88 9.88 9.9 9.89 9.92 9.94 9.95 9.96 9.96 9.98 9.99 10