Experiment : You took 0.51 g of an unknown weak organic acid and dissolved it in 50. ml of water.Then titrated the solution with 0.100 M NAOH and measured the pH after adding 5.00 ml increments ofthe base, and collected the following data.NaOH (ml) PH0.02.455.02.9510.03.9215.04.0520.04.3525.08.1035.012.0140.012.2045.012.5050.012.8 Use the Excel spread sheet and plot :pH ( Y-axis ) ---- volume ( X-axis )• Determine the equivalence point from the plot )Find the half equivalence point(from the plot )Determine the molar mass of the unknown acidDetermine the Ka of the acid.Equivalence PointNaOH ( ml )mol NaOHMol Acidg acid usedMolar mass of acidHalf-equivalence pointpHpkaКа

Given: Mass of acid = 0.51 g Volume of solution = 50 mL = 0.050 L…

Experiment: You took 0.51 g of an unknown weak organic acid and dissolved it in 50. ml of water. Then titrated the solution with 0.100 M NaOH and measured the pH after adding 5.00 ml increments of the base, and collected the following data. NaOH (ml) PH 0.0 2.45 5.0 2.95 10.0 3.92 15.0 4.05 20.0 4.35 25.0 8.10 35.0 12.01 40.0 12.20 45.0 12.50 50.0 12.8

Experiment: You took 0.51 g of an unknown weak organic acid and dissolved it in 50. ml of water. Then titrated the solution with 0.100 M NaOH and measured the pH after adding 5.00 ml increments of the base, and collected the following data. NaOH (ml) PH 0.0 2.45 5.0 2.95 10.0 3.92 15.0 4.05 20.0 4.35 25.0 8.10 35.0 12.01 40.0 12.20 45.0 12.50 50.0 12.8

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter21: Potentiometry

Section: Chapter Questions

Problem 21.22QAP

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