A solution is known to contain 38.04 ± 0.03 mM KCl, and you have taken an aliquot of this solution using a pipette calibrated to deliver 20.013 ±0.006 m L. Determine the number of moles of KCl that are delivered in the aliquot, including the absolute uncertainly in that value.

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1. A solution is known to contain 38.04 ± 0.03 mM KCl, and you have taken an
aliquot of this solution using a pipette calibrated to deliver 20.013 ±0.006 mL.
Determine the number of moles of KCl that are delivered in the aliquot, including
the absolute uncertainly in that value.
2. You deliver the aliquot taken in problem 1 into a volumetric flask with a volume of
250.00 mL ± 0.02 % and dilute the solution to volume in the flask using Dl water.
What is the concentration of KCl in this flask, report your answer with the absolute
uncertainty.
3. Tabulated below are replicate titration volumes for an analysis. What is the error
(both absolute and percent) for the average titration volume?
Transcribed Image Text:1. A solution is known to contain 38.04 ± 0.03 mM KCl, and you have taken an aliquot of this solution using a pipette calibrated to deliver 20.013 ±0.006 mL. Determine the number of moles of KCl that are delivered in the aliquot, including the absolute uncertainly in that value. 2. You deliver the aliquot taken in problem 1 into a volumetric flask with a volume of 250.00 mL ± 0.02 % and dilute the solution to volume in the flask using Dl water. What is the concentration of KCl in this flask, report your answer with the absolute uncertainty. 3. Tabulated below are replicate titration volumes for an analysis. What is the error (both absolute and percent) for the average titration volume?
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