Data TableTest mL ofmL of pHtube HOAc NaOAc TrialTrial pHHOACpH Average Millimoles Millimoles pKaNaOAc1211.009.005.05.023.007.006.06.035.005.005.05.047.003.005.06.059.001.005.06.0Average calculated pKaActual pKa from textbook

To calculate the average pH and average calculated pKa, we first need to determine the…

Answered: Data Table Test mL of mL of pH tube…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question 16 Caffeine, benzoate, and aspartame content of mountain dew soda was determined using reverse phase HPLC. The concentration of the standard used are as follows, caffeine: 0.70 mg/mL, benzoate: 1.6 mg/mL, and aspartame 5.0 mg/mL. The following volume of the standards were taken to a 50.0 mL volumetric flask and diluted to the mark to construct a calibration curve: Caffeine Benzoate Aspartame 1 mL 1 mL 1 mL 2 mL 2 mL 2 mL 3 mL 3 mL 3 mL 4 mL 4 mL 4 mL 5 mL 5 mL 5 mL The 12-oz can mountain dew sample were treated as follows: The 12- oz can were has been left out overnight to get rid the carbonation then, 2 mL were drawn into a plastic syringe, filtered, and placed into a vial. An equal amount of deionized water was added. A 100 μL sample were injected into a sample loop using same parameters with the standards. Assume 12 oz 354.9 mL The following data were obtained: Peak Area Benzoate Caffeine Aspartame Std 1 2.30 3.54 3.33 Std 2 4.10 5.59 5.83 Std 3 7.37 9.98 9.63 Std 4 9.56…
175.0 mL of 0.10 M C2H5NH2 with 285.0 mL of 0.20 M C2 H5NH3 Cl Express your answer using two decimal places. ΑΣφ ...... pH
Part A What mass of KBr (in grams) should you use to make 100.0 mL of a 1.70 M solution of KBr? Express the mass to three significant figures and include the appropriate units. m = Submit 0 μA Value Provide Feedback Request Answer Units ?
A chemistry student weighs out 0.0312 g of sulfurous acid (H, SO,, a diprotic acid, into a 250. mL volumetric flask and dilutes to the mark with distilled w He plans to titrate the acid with 0.1000M NAOH solution. Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Round your answer to 3 significant digits. mL x10 Explanation Check O 2022 McGraw Hill LLC. AII Rights Reserved. Terms of Use | Privacy Center | Ac 80°F Cloudy DELL F7 F8 F9 F10 F11 F12 PrtScr Insert Delete PgL F1 F2 F3 F4 F5 F6 Fn @ %2# & Backspace
How much calcium would you ingest by drinking one 8 oz glass of your tap water? Show all calculations. Tap Water Trial 1 Tap Water Trial 2 Tap Water Trial 3 Initial Syringe Reading 1.0ml 1.0ml 1.0ml Final Syringe Reading 0.65ml 0.68ml 0.67ml Volume of EDTA Consumed 0.35ml 0.32ml 0.33ml Water Hardness ppm CaCO3 70.07 ppmCaCO3 64.064 ppmCaCO3 66.066 ppmCaCO3 Average ppm 66.73 ppmCaCO3
10 F4 Part D S A solution formed by mixing 13.0 mL of 0.130 M HBr with 24.0 mL of 0.200 MHCI Express your answer using three decimal places. pH = Provide Feedback Submit H R F5 % 5 ΑΣΦ Request Answer F6 T < 60 F7 F8 & 7 ? с F9 a F10 F11 :6: 00 K
You run the chromatography system with paper as the stationary phase and 70% isopropanol as the mobile phase. You determine the Rf of a polar analyte to be 0.40. If you use 100% isopropanol (a less polar solvent) instead of isopropanol as the mobile phase what would you expect to happen to the Rf value? No value effect on Rf higher lower could be higher or lower
Question 14 Caffeine, benzoate, and aspartame content of mountain dew soda was determined using reverse phase HPLC. The concentration of the standard used are as follows, caffeine: 0.70 mg/mL, benzoate: 1.6 mg/mL, and aspartame 5.0 mg/mL. The following volume of the standards were taken to a 50.0 mL volumetric flask and diluted the mark to construct a calibration curve: Caffeine Benzoate Aspartame 1 mL 1 mL 1 mL 2 mL 2 mL 2 mL 3 mL 3 mL 3 mL 4 mL 4 mL 4 mL 5 mL 5 mL 5 mL The 12-oz can mountain dew sample were treated as follows: The 12- oz can were has been left out overnight to get rid the carbonation then, 2 mL were drawn into a plastic syringe, filtered, and placed into a vial. An equal amount of deionized water was added. A 100 μL sample were injected into a sample loop using same parameters with the standards. Assume 12 oz = 354.9 mL The following data were obtained: Caffeine Peak Area Benzoate 3.54 Aspartame Std 1 2.30 3.33 Std 2 4.10 5.59 5.83 Std 3 7.37 9.98 9.63 Std 4 9.56…
PAPER CHROMATOGRAPHY Additional details: 20mL distilled water + 20mL 95% ethyl alcohol solution was used Main Question: Give the inferences (by color) of the following spots in the picture below
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Mr. Z measured the pH of the pond water in USC pond. His measurements are as follows: 8.1, 7.8, 8.2, 7.9, 8.0, 8.3 If the true pH of the pond water is 8.2, a) Calculate the absolute error. b) Calculate the relative error c) Calculate the percent relative error d) Calculate the standard deviation e) Calculate the relative standard deviation

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Data Table Test mL of mL of pH tube HOAc NaOAc Trial Trial pH HOAC pH Average Millimoles Millimoles pKa NaOAc 1 2 1 1.00 9.00 5.0 5.0 2 3.00 7.00 6.0 6.0 3 5.00 5.00 5.0 5.0 4 7.00 3.00 5.0 6.0 5 9.00 1.00 5.0 6.0 Average calculated pKa Actual pKa from textbook