- Identify The First Gulvalence Point On The Titration Curve The First Equivalence Point Corresponds To The First Maximum 1 (17.63 KiB) Viewed 158 times
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(5pts) Molar mass of unknown acid Uning the volume at the second equivalence point and the average concentration of your standardized Nacht solution find the amount of acid present and the molar mass of the unknown acid (tt) Amount of NaOH (mol) needed to reach the second equivalence point (Zote). Amount of unknown acid (nol (20) Molar mass of unknowned (Spta) Part - Identity of unknown acid Use the following data to identify your unknown acid Acid Formula tilyo CNO Malele acid CHO Maloniaid CHO Orale MO Tortoric acid CH 14510 10104 100 2600" 20010 1.500 64010 4010 10010 Sto) What is most that the entity of your unknown cie? Choose
Plot of pH vs Volume of (concn mol/L) NaOH for Unkonw Acid 1 14 12 10 8 6 4 2 0 0.00 5.00 35.00 40.00 45.00 10.00 15.00 20.00 25.00 30.00 Volume of NaOH added (ml) Plot of the First Derivative of pH versus Volume of NaOH added (ml) for Unkonw Acid 1 2.000 1.800 1.600 6 1.400 1.200 1.000 0.800 0.600 0.400 0.200 0.000 0.00 First Derivative of pH الا 5.00 30.00 35.00 40.00 10.00 15.00 20.00 25.00 Volume of NaOH added (ml)
Report Table DM.2: Titration Data Titration of unknown dipectic acid With NaOH Volume (mt) PH 1.24 0.00 1.30 1.00 2.00 3.00 1.42 5.52 4.00 1.57 5.00 1.62 6.00 1.81 Data point 1 (Initial measurement) Data point 2 Data point 3 Data point 4 Data point 5 Data point 6 Data point 7 Data points Data point Data point 10 Data point 11 Data point 12 Data point 13 Data point 14 7.00 1.91 8.00 2.02 9.00 2.14 2.29 10.00 11.00 11.98 2.51 283 13.00 4.34 Data point 15 14.00 5.35 Data point 16 15.00 5.88
16.00 6.09 16.99 6.25 17.95 6.40 18.95 6.52 19.99 6.65 21.00 6.80 22.01 6.97 23.01 7.11 24.03 7.37 25.02 7.73 Data point 17 Data point 18 Data point 19 Data point 20 Data point 21 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 26.02 10.62 27.05 11.47 28.10 11.76 29.10 11.92 30.10 12.04 31.10 12.11 32.10 12.18 33.10 12.22 34.10 1226 35.10 12.30
35.10 12.30 36.10 12.31 Data point 36 Data point 37 Data point 38 Data point 39 Data point 40 37.09 12.32 38.08 12.33 39.09 12.34 Report Table DM.2: Titration Data 12.00 11.00 10.00 9.00 8.00 7.00 6:00 3.00 . & 4.00 3.00 2.00 1.00 0.00 0.00 2.00 400 6.00 8.00 10.00 12.00 1400 16.00 18.00 20.00 22.00 24.00 26.00 28.00 30.00 3200 34.00 36.00 38.00 Volume (ML)
Identify the first equivalence point on the titration curve. The first equivalence point corresponds to the first maximum of the first derivative plot (1 pts) What is the first volume measurement (lower volume) where the first maximum of the first derivative occurs? 13.00 Identify the second equivalence point on the titration curve. The second equivalence point corresponds to the second maximum of the first derivative plot. (1 pts) What is the second volume measurement (higher volume) where the second maximum of the first derivative occurs? (1 pts) Volume of NaOH (m.) at first midpoint (2pts) Estimate the pH at the first midpoint. This represents PK 1: (2pts) What is the K.1?
(Ipts) Volume of NaOH (ML) at second midpoint. (Ipts) Estimate the pH at the second midpoint. This represents pka2 (2pts) What is the Kuz? (5pts) Molar mass of unknown acid Using the volume of the second equivalence point and the average concentration of your standardized NaOH solution, find the amount of acid present and the molar mass of the unknown acid. (1pts) Amount of NaOH (mol) needed to reach the second equivalence point (2pts) Amount of unknown acid (mol)
(2pts) Molar mass of unknown acid, (5pts) Part C-Identity of unknown acid Use the following data to identify your unknown acid, Acid Formula Ethylglutamic acid CyHNO Maleic acid CAH,04 Malonic acid CyH04 Oxalic acid C₂H₂O4 Tartaric acid C.H.06 Ка1 1.43 10-4 1.50102 1.50 X 100 5.90 x 10-2 1.00 x 10 Kaz 1.45 x 10 260 x 107 200 x 10-6 6.40 x 10-5 4.60 X 105 (5pts) What is most likely the identity of your unknown acid? Choose