Chem 112 Lab report - 12.8 5.95 9.75 11.75 12.9 6.15 9.75 11.95 13.9 6.35 9.79 6.55 9.8 6.75 9.82 6.95 9.85 7.15 9.86 7.35 9.89 7.55 9.91 7.75

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Lab report 6: Objective We are doing the same thing as we did for experiment 5 but this time we are using soda, which is acidic. Procedure: 1) We chose to use the dark liquid, which is coke. We put 10ml of it in a small beaker. 2) We filled the buret 40.4ml with 0.02 M NaOH solution. 3) We then added the NaOH to effect the liquid by a pH change of 0.2 until we got to 11.95 Data: pH Volume pH Volume 2.55 9.6 8.35 9.939 2.75 9.63 8.55 9.95 2.95 9.65 8.75 9.97 3.15 9.66 8.95 9.98 3.35 9.67 9.15 9.983 3.55 9.68 9.35 10.00 3.75 9.69 9.55 10.08 3.95 9.695 9.75 10.12 4.15 9.7 9.95 10.15 4.35 9.705 10.15 10.2 4.55 9.708 10.35 10.25 4.75 9.709 10.53 10.3 4.95 9.71 10.75 10.43 5.15 9.712 10.95 10.9 5.35 9.715 11.15 11.4 5.55 9.717 11.35 11.85 5.75 9.72 11.55
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Unformatted text preview: 12.8 5.95 9.75 11.75 12.9 6.15 9.75 11.95 13.9 6.35 9.79 6.55 9.8 6.75 9.82 6.95 9.85 7.15 9.86 7.35 9.89 7.55 9.91 7.75 9.923 7.95 9.93 8.15 9.935 2 4 6 8 10 12 14 0 5 10 15 Series1 Calculations: Moles of NaOH = .022 m/L x .0401L = 9.1238e-4 moles NaOH Moles of Coke = 9.1238e-4 / 3 = 3e-4 Concentration of Coke = 3e-4 / .01L = 0.030m/L Discussion: My graph seems to be very off, but that is only because when we put in one drop of NaOH, it would jump many pH values and we had to make good estimations. The Ka value presented in the lab and mine also varied because of this experimental error....
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This note was uploaded on 04/30/2008 for the course CHEMISTRY 112 taught by Professor Whelan during the Spring '08 term at UMass (Amherst).

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Chem 112 Lab report - 12.8 5.95 9.75 11.75 12.9 6.15 9.75 11.95 13.9 6.35 9.79 6.55 9.8 6.75 9.82 6.95 9.85 7.15 9.86 7.35 9.89 7.55 9.91 7.75

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