- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 1 (26.37 KiB) Viewed 303 times
- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 2 (26.37 KiB) Viewed 303 times
- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 3 (26.4 KiB) Viewed 303 times
- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 4 (28.54 KiB) Viewed 303 times
- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 5 (31.08 KiB) Viewed 303 times
- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 6 (33.64 KiB) Viewed 303 times
- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 7 (43.51 KiB) Viewed 303 times
- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 8 (33.75 KiB) Viewed 303 times
- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 9 (37.04 KiB) Viewed 303 times
- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 10 (31.57 KiB) Viewed 303 times
- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 11 (34.21 KiB) Viewed 303 times
- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 12 (34.02 KiB) Viewed 303 times
- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 13 (34.76 KiB) Viewed 303 times
- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 14 (34.2 KiB) Viewed 303 times
- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 15 (34.83 KiB) Viewed 303 times
- Report Summary Diprotic Acid 2pts Determination Of The Molar Mass And Identity Of A Diprotic Acid How Will You Collect 16 (37.27 KiB) Viewed 303 times
REPORT SUMMARY Data point 2 1.00 1.95 Data point 3 2.00 200 Data point 4 3.00 2.06 Data point 5 4,00 2.12 Data point 6 5,00 2.18 Data point 7 6.00 2.28 7.00 2.35 8.00 2.46 9.00 2.59 Data point 8 Data point 9 Data point 10 Data point 11 Data point 12 Data point 13 Data point 14 Data point 15 10.00 2.73 11.00 2.91 12.00 3.14 13.00 3.62 14.00 4.95 Data point 16 15.00 5.39 Data point 17 16.00 5.67 Data point 18 17.00 5.81 Data point 19 Data point 20 18.00 5.97 19,00 6.10
REPORT SUMMARY Data point 2 20.00 624 21.00 6.36 22.00 6.49 23.00 6,63 24.00 6,67 25.00 6.94 26.00 7.23 27.00 7.80 28.00 11.89 Data point 22 Data point 23 Data point 24 Data point 25 Data point 26 Data point 27 Data point 28 Data point 29 Data point 30 Data point 31 Data point 32 Data point 33 Data point 34 Data point 35 Data point 36 Data point 37 Data point 38 29.00 12.30 30.00 12.50 31.00 12.62 32.00 12.71 33.00 12.78 34.00 12.84 35.00 12.88 36.00 12.92 37.00 12.95 Data point 39 38.00 12.98 Data point 40 39.00 13.01
REPORT SUMMARY Data point 29 28.00 11.89 Data point 30 29.00 12.30 Data point 31 30.00 12.50 Data point 32 31.00 12.62 Data point 33 32.00 12.71 Data point 34 33.00 12.78 Data point 35 34.00 12.84 Data point 36 35,00 12.88 36.00 12.92 Data point 37 Data point 38 Data point 39 Data point 40 37.00 12.95 38.00 12.98 39.00 13.01 Report Table DM.1: Titration Data 13.00 12.00 11.00 10.00 9.00 8.0 7.00 6.00 5.00
REPORT SUMMARY 34.00 12.84 35.00 12.88 36.00 12.92 Data point 35 Data point 36 Data point 37 Data point 38 Data point 39 Data point 40 37.00 12.95 38.00 12.98 39.00 73.01 Report Table DM. 1. Titration Data 13.00 12.00 11.00 10.00 9.00 8.00 7.00 6.00 500 4.00 2.00 2.00 1.00 0.00 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14:00 16:00 18:00 20:00 22.00 24.00 2600 28.00 30.00 3200 34.00 36.00 38 00 Volume (m) PA . . . . .
REPORT SUMMARY (21pts) Interpreting the titration curve Make a plot of pH (vertical axis) versus ml. NaOH added or use the titration curve above. You will use this plot to determine the buret readings at the 1st and 2nd equivalence points, the values of K, and K, of the unknown acid, and the molar mass of the acid Because pH was recorded at about 1 ml increments, you will need to do some estimating of pH values. A good approach is to average the known values on either side of the point you want to estimate. There will be some error in your estimates, but it should be small enough for our purposes. Identify the first equivalence point on the titration curve. The first equivalence point will be less noticeable than the second equivalence point. First, find the two volume measurements where the second largest change in pH occurs. Ther, take the average of these two volumes to find where the equivalence occurs (ipts) What is the first volume measurement (lower volume) where the second largest change in pH occurs? 13 (1 pts) What is the second volume measurement (higher volume) where the second largest change in pH occurs? 14 SV (1pts) Take the average of these two volumes to find where the first equivalence point occurs What is the volume needed to reach the first equivalence point? 13,5 Saved (1 pts) Volume at 50% of the first equivalence point 6.75 Sivil
REPORT SUMMARY Change in PH OCCUSY (1 pts) Take the average of these two volumes to find where the first equivalence point occurs. What is the volume needed to reach the first equivalence point? 13.5 (tts) Volume at 50% of the first equivalence point 6.75 Sarea (2pts) Estimate the pH at 50% volume of the first equivalence point. This represents pk 1 2.35 Surved (2pts) What is the K? 0.00446 Save Identify the second equivalence point on the titration curve First, find the two volume measurements where the largest change in pH occurs. Then, take the average of these two volumes to find where the equivalence occurs (1pts) What is the first volume measurement (lower volume) where the largest change in pH occurs? 27 (1pts) What is the second volume measurement (higher volume) where the largest change in pH Occur? 28
REPORT SUMMARY Identify the second equivalence point on the titration curve. First, find the two volume measurements where the largest change in pH occurs. Then, take the average of these two volumes to find where the equivalence occurs. (1pts) What is the first volume measurement (lower volume) where the largest change in pH occurs? 27 (Ipts) What is the second volume measurement (higher volume) where the largest change in pH occurs? 28 Saved (2pts) Take the average of these two volumes to find where the second equivalence point occurs What is the volume needed to reach the second equivalence point? 27.5 ver (1pts) Volume at 50% between the first and second equivalence point, 13.5 (ipts) Estimate the pH at the volume 50% between the first and second equivalence point. This represents pk2 3.62 (2pts) What is the K? 2.39E-4
REPORT SUMMARY (5pts) Follow the directions in your lab manual to make a graph of your titration data. Upload a copy of your graph here. We Browse your files to upload or Drag and Drop Max attachments: 5 Max Size: 20.00MBeach Screen Shot 2021-11-2 (5pts) Molar mass of unknown acid Using the volume of the second equivalence point, find the moles of acid present and the molar mass of the unknown acid. (Ita) Moles NaOH needed to reach the second equivalence point 0.0065 (2pts) Moles of unknown acid 0.00325 Save
REPORT SUMMARY (5pts) Molar mass of unknown acid Using the volume of the second equivalence point, find the moles of acid present and the molar mass of the unknown acid. (Ipts) Moles NaOH needed to reach the second equivalence point. 0.0065 (2pts) Moles of unknown acid, 0.00325 savo (2pts) Molar mass of unknown acid 244 Saved (5pts) Part C - Identity of unknown acid Use the following data to identify your unknown acid Acid Formula Ka KA Ethylglutamic acid CH1N04 1.43 x 104 1.45 x 10° Maleic acid CH404 1.50 x 10-2 2.60 K 107 CaH404 Malonic acid Oxalic acid 200 x 10-6 1.50 x 10 5.90 x 10-2 C2H204 640 X 105 Tartaric acid CAH606 100X10 460 x 10-5
REPORT SUMMARY Use the following data to identify your unknown acid, Acid Formula Koz KI 1.43 104 Ethylglutamic acid C7H13N04 1.45 x 10- Maleic acid CcH404 1.50 x 10-2 2.60 x 107 Malonic acid G3H404 1.50 x 103 200 x 10-6 Oxalic acid C2H204 6.40 x 10-5 Tartoric acid 5.90 x 10-2 1.00 x 10 CcH606 4.60 x 10-5 (5pts) What is most likely the identity of your unknown acid? Maleic acid Samed (1pts) Calculations (1pts) For full credit, upload your work for the calculation of K1, K2, and the molat mass of your unknown acid, including all units. Browse your files to upload or Drag and Drop Myrtachments 0 Max SOLOMBO
Voss REPORT SUMMARY For full credit, upload your work for the calculation of Ki Ka2 and the molar mass of your unknown acid, including an uns Browse your files to upload or Drag and Drop Max attachments: 101 Max Size: 20.00MB euch (5pts) Post-lab Questions 1. From a pH meter titration curve a student experimentally determines the pk of benzoic acid to be 4.06. Calculate the experimental K, for benzoic acid If the K, for benzoic acid is 6.3 * 109, determine the percent error in their experimental results. Cipta) Experimental K, for benzoic acid 8.71E-5 Save (1pts) Percent error 27.67 Sowed (3pts) 2. Draw a generic pH meter titration curve for the titration of a monoprotic weak acid, HA, with a strong bose, OH Download the titration curve below or copy it down on a piece of paper, adding an appropriate title Label the following items being careful to show exact placement on the curve for full credit
REPORT SUMMARY (spis) Molar mass of unknown acid Using the volume of the second equivalence point, find the moles of acid present and the molar mass of the unknown acid, (Ipts) Moles NaOH needed to reach the second equivalence point 0.0065 Saved (2pts) Moles of unknown acid 0.00325 oved (2pts) Molar mass of unknown acid 244 Saved (5pts) Part C - Identity of unknown acid Use the following data to identify your unknown acid Acid Formula Ka K2 Ethylglutamic acid CH1N04 1.43 104 1.45 x 10- Maleic acid CH404 1.50 x 10-2 2.60 K 107 CaH404 1.50 x 10-2 Malonic acid Oxalic acid 200 x 10-6 C2H204 5.90 x 10-2 640 X 105 Tartaric acid CAH.O. 100X10 4.60 X 105
REPORT SUMMARY changem pH OCCU137 (Ipts) Take the average of these two volumes to find where the first equivalence point occurs, What is the volume needed to reach the first equivalence point? 13.5 (Ipts) Volume at 50% of the first equivalence point. 6.75 (2pts) Estimate the pH at 50% volume of the first equivalence point. This represents PK 1 2.35 (2pts) What is the Ki? 0.00446 Save Identify the second equivalence point on the titration curve. LD First, find the two volume measurements where the largest change in pH occurs. Then, take the average of these two volumes to find where the equivalence occurs. (pte) What is the first volume measurement (lower volume) where the largest change in pH occurs? 27 (1 pts) What is the second volume measurement (higher volume) where the largest change in pH occurs 28
R-Determination of Molar Mass and Identity of a Diprotic Acid REPORT SUMMARY For full credit Upload your work for the calculation of Kat, K, and the molar mass of your unknown acid, including all units. Browse your files to upload or Drag and Drop Max attachments. 10 Max Size: 20.00MB each (5pts) Post-lab Questions 1. From a pH meter titration curve a student experimentally determines the pk, of benzoic acid to be 4.06. Calculate the experimental K, for benzoic acid of the K, for benzoic acid is 6.3 * 1015, determine the percent error in their experimental results. (1pts) Experimental K, for benzoic acid 8.71E-5 savo (1 pts) Percent error 27.67 (3pts) 2 Draw a generic pH meter titration curve for the titration of a monoprotic weak acid, HA with a strong base, OH. Download the titration curve below or copy it down on a piece of paper, adding an appropriate title Label the following items being careful to show exact placement on the curve for full credit