You have a stock solution certified by a manufacturer to contain 150.0 z 0.3 mg SO42-...
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You have a stock solution certified by a manufacturer to contain 150.0 z 0.3 mg SO42- /mL. You would like to dilute it by a factor of 100 to obtain 1.500 mg SO42- /mL. Two possible dilution methods are shown below: 1) 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. 2) Dilute 1.000 ml up to 100 mL with a transfer pipet and volumetric flask. Please calculate the resulting uncertainties in the concentration for each method. (Class A) Tolerance for 100ml capacity volumetric flask = +/-0.08mL (Class A) Tolerance for 10ml transfer pipet= +/-0.02mL Explain why one method is more precise than the other. You have a stock solution certified by a manufacturer to contain 150.0 z 0.3 mg SO42- /mL. You would like to dilute it by a factor of 100 to obtain 1.500 mg SO42- /mL. Two possible dilution methods are shown below: 1) 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. 2) Dilute 1.000 ml up to 100 mL with a transfer pipet and volumetric flask. Please calculate the resulting uncertainties in the concentration for each method. (Class A) Tolerance for 100ml capacity volumetric flask = +/-0.08mL (Class A) Tolerance for 10ml transfer pipet= +/-0.02mL Explain why one method is more precise than the other.
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Related Book For
Chemistry The Central Science
ISBN: 978-0321696724
12th edition
Authors: Theodore Brown, Eugene LeMay, Bruce Bursten, Catherine Murphy, Patrick Woodward
Posted Date:
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