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You have a stock solution certified by a manufacturer to contain 245.0 ± 0.4 µg SO4¯/mL. You would like to dilute it by a factor of 100 to obtain 2.450 µg/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 1-mL transfer pipet 10-mL transfer pipet 100-mL volumetric flask 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: ± 0.0049 absolute uncertainty: + Incorrect Tolerance +0.006 mL +0.02 mL +0.08 mL Method B: Dilute 1.000 mL up to 100 mL with a transfer pipet and volumetric flask. 0.4 μg/mL μg/mL

You have a stock solution certified by a manufacturer to contain 245.0 ± 0.4 µg SO4¯/mL. You would like to dilute it by a factor of 100 to obtain 2.450 µg/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 1-mL transfer pipet 10-mL transfer pipet 100-mL volumetric flask 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: ± 0.0049 absolute uncertainty: + Incorrect Tolerance +0.006 mL +0.02 mL +0.08 mL Method B: Dilute 1.000 mL up to 100 mL with a transfer pipet and volumetric flask. 0.4 μg/mL μg/mL

Chemistry
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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You have a stock solution certified by a manufacturer to contain 245.0 ± 0.4 µg SOź¯/mL. You would like to dilute it by a factor of 100 to obtain 2.450 µg/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 ±0.006 mL 10-mL transfer pipet +0.02 mL 100-mL volumetric flask +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. 0.0049 absolute uncertainty: ± ug/mL Incorrect Method B: Dilute 1.000 mL up to 100 mL with a transfer pipet and volumetric flask. 0.4 absolute uncertainty: ± ug/mL Incorrect
Transcribed Image Text:You have a stock solution certified by a manufacturer to contain 245.0 ± 0.4 µg SOź¯/mL. You would like to dilute it by a factor of 100 to obtain 2.450 µg/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 ±0.006 mL 10-mL transfer pipet +0.02 mL 100-mL volumetric flask +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. 0.0049 absolute uncertainty: ± ug/mL Incorrect Method B: Dilute 1.000 mL up to 100 mL with a transfer pipet and volumetric flask. 0.4 absolute uncertainty: ± ug/mL Incorrect
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