You have a stock solution certified by a manufacturer to contain 225.0 + 0.4 ug SO-/mL. You would like to dilute it by a factorof 100 to obtain 2.250 ug/mL. Two possible methods of dilution are stated. For each method, calculate the resulting absoluteuncertainty in concentration. Use the manufacturer's tolerances in the table for uncertainties.GlasswareTolerance1-mL transfer pipet+0.006 mL10-mL transfer pipet+0.02 mL100-mL volumetric flask+0.08 mLMethod A: Dilute 10.00 mL up to 100 mL with a transfer pipet and volumetric flask. Then take 10.00 mL of the dilute solutionand dilute it again to 100 mL.0.004absolute uncertainty: +ug/mLIncorrect Method B: Dilute 1.000 mL up to 100 mL with a transfer pipet and volumetric flask.0.009absolute uncertainty: +ug/mLIncorrect

Method A: Dilute 10.00 mL upto 100 mL with a transfer pipet and volumetric flask. Then take 10.00 mL…

Answered: You have a stock solution certified by…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.21QAP

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Patients undergoing an upper gastrointestinal tract laboratory test are typically given an X-ray contrast agent that aids with the radiologic imaging of the anatomy. One such contrast agent is sodium diatrizoate, a nonvolatile water-soluble compound. A 0.378-m solution is prepared by dissolving 38.4 g sodium diatrizoate (NaDTZ) in.l.60 102 mL water at 3 1.2C (the density of water at 31.2C is 0.995 g/cm3). What is the molar mass of sodium diatrizoate? What is the vapor pressure of this solution if the vapor pressure of pure water at 31.2C is 34.1 torr?
An HPLC method was developed for the separation and determination of ibuprofen in blood samples. A 3.00 mL blood sample dissolved in 70.00 mL solvent was prepared and 10.0 mL was injected into the HPLC. Standard ibuprofen solutions were also run.Calculate the ibuprofen present in the 3.00 mL blood sample The following data were obtained. Table po itoo: Ibuprofen concentration, mg/ml0.50 1.0 2.0 3.0 Blood sample Peak area (Right column)5.29.617.419.911.4
You have a stock solution certified by a manufacturer to contain 175.0 + 0.3 mg SO;-/ml. You would like to dilute it by a factor of 100 to obtain 1.750 pg/mL. Two possible methods of dilution are stated. For each method, calculate the resulting absolute uncertainty in concentration. Use the manufacturer's tolerances in the table for uncertainties. Glassware Tolerance 1-mL transfer pipet 10 mL transfer pipet 100-ml volumetric flask +0.006 ml. 10.02 ml. +0.08 ml. Method A: Dilute 10.00 mL up to 100 mL with a transfer pipet and volumetric flask. Then take 10.00 mL of the dilute solution and dilute it again to 100 mL. absolute uncertainty: + wg/mL Method B: Dilute 1.000 ml. up to 100 ml. with a transfer pipet and volumetric flask. absolute uncertainty: + wg/mL Why is one method more precise than the other? O Method B is more precise because the percent relative uncertainty in the l-mL pipet is 0.6%, which is 3 times larger than the uncertainties of the other glassware. O Method B is more…
Come up with a dilution scheme starting from 1000 μg/mL Mn stock solution so that the concentration of permanganate in the solutions just prior to measurement (after Step B.6.) are: 7.5, 15.0, 22.5, 30.0 and 37.5 μg/mL MnO4-. Carefully read the units!
Table A: Standard NaCl used to make primary standard solution Mass of weighing bottle + NaC1 (g) 21.8720 Mass of weighing bottle after transfer (g) 21.772 Mass of NaCl used in solution (g) 0.6948 Purity of NaCl (%) 100.03 Table A: unknow used to make primary standard solution Mass of weighing bottle + unknow (g) Mass of weighing bottle after transfer (g) 16.8777 16.20010 Mass of unknow used in solution (g) 0.6776 Purity of unknow (%)
The standard addition method is used to analyze a sample of a river water for mercury. Solution A is made by pipetting 5.00 mL of undiluted sample in to a 10 mL volumetric flask and filling to the mark with D water. Solution B is made by pipetting 5.00 mL of undiluted sample and 3.00 mL of 15.0 ppb of Hg standard into same 10.0 mL volumetric flask and filling to the mark with DI. Solution A and B are analyzed using atomic absorption spectroscopy and give a percent transmittance values of 56 % and 33 % respectively (not blank corrected). A blank has a transmittance of 96%. Which of the following technique can be used to determine the amount of mercury in the undiluted sample of river water? O A. IR spectroscopy O B. Cold vapor atomic absorption OC. Hydride generation atomic absorption OD. Electrothermal atomic absorption
1. The following data are from total and volatile solids tests on a wastewater. Calculate the total and volatile solids concentration in mg/L. Weight of empty dish = 68.942 g Weight of dish + dry solids = 69.053 g Weight of dish + ignited solids = 69.003 g Volume of wastewater sample = 100 mL
The standard addition method is used to analyze a sample of a river water for mercury. Solution A is made by pipetting 5.00 mL of undiluted sample in to a 10 mL volumetric flask and filling to the mark with DI water. Solution B is made by pipetting 5.00 mL of undiluted sample and 3.00 mL of 15.0 ppb of Hg standard into same 10.0 mL volumetric flask and filling to the mark with DI. Solution A and B are analyzed using atomic absorption spectroscopy and give a percent transmittance values of 56 % and 33 % respectively (not blank corrected). A blank has a transmittance of 96%. What is the corrected absorbance of both solution A and B? OA. Solution A: 0.123 Solution B: 0.463 O B. Solution A: 0.463 Solution B: 0.234 O C. Solution A: 0.123 Solution B: 0.234 O D. Solution A: 0.234 Solution B: 0.463
6. A stock solution containing 25% w/v of chlorhexidine is used to prepare an antiseptic such that when the antiseptic is diluted 1 in 25, a 1 in 500 wash solution is obtained which is ready for use by the patient. What volume (ml) of the stock solution is required to prepare 5 litres of the antiseptic to fulfil a bulk manufacturing order?
The standard addition method is used to analyze a sample of a river water for mercury. Solution A is made by pipetting 5.00 mL of undiluted sample in to a 10 mL volumetric flask and filling to the mark with DI water. Solution B is made by pipetting 5.00 mL of undiluted sample and 3.00 mL of 15.0 ppb of Hg standard into same 10.0 mL volumetric flask and filling to the mark with DI. Solution A and B are analyzed using atomic absorption spectroscopy and give a percent transmittance values of 56 % and 33 % respectively (not blank corrected). A blank has a transmittance of 96%. What is the corrected absorbance of both solution A and B? A. Solution A: 0.123 Solution B: 0.463 B. Solution A: 0.463 Solution B: 0.234 C. Solution A: 0.123 Solution B: 0.234 D. Solution A: 0.234 Solution B: 0.463
The standard addition method is used to analyze a sample of a river water for mercury. Solution A is made by pipetting 5.00 mL of undiluted sample in to a 10 mL volumetric flask and filling to the mark with DI water. Solution B is made by pipetting 5.00 mL of undiluted sample and 3.00 mL of 15.0 ppb of Hg standard into same 10.0 mL volumetric flask and filling to the mark with DI. Solution A and B are analyzed using atomic absorption spectroscopy and give a percent transmittance values of 56 % and 33 % respectively (not blank corrected). A blank has a transmittance of 96%. What is the corrected absorbance of both solution A and B? O A. Solution A: 0.123 Solution B: 0.463 O B. Solution A: 0.463 Solution B: 0.234 O C. Solution A: 0.123 O D. Solution A: 0.234 Solution B: 0.234 Solution B: 0.463
Prepare 1500mL of 0.5N H2SO4 solution with specific gravity of 1.84g/mL and assay of 97%. Write complete solution using padpaper.

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