You have a stock solution certified by a manufacturer to contain 220.0 + 0.4 ug So /ml. You would like to dilute it by a factor of 100 to obtain 2.200 g/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 20.006 ml. 10-ml transfer pipet 10.02 ml. 100-ml volumetric flask 10.08 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: = 14 He/ml. Incemet Method B: Dilute 1.000 mL up 10 100 mL with a transfer pipet and volumetric flask. absolute uncertainty: 0.6 Helml.
You have a stock solution certified by a manufacturer to contain 220.0 + 0.4 ug So /ml. You would like to dilute it by a factor of 100 to obtain 2.200 g/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 20.006 ml. 10-ml transfer pipet 10.02 ml. 100-ml volumetric flask 10.08 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: = 14 He/ml. Incemet Method B: Dilute 1.000 mL up 10 100 mL with a transfer pipet and volumetric flask. absolute uncertainty: 0.6 Helml.
Chapter7: Statistical Data Treatment And Evaluation
Section: Chapter Questions
Problem 7.13QAP
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