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Problem 160 Hard Difficulty

The recommended procedure for preparing a very dilute solution is not to weigh out a very small mass or measure a very small volume of a stock solution. Instead, it is done by a series of dilutions. A sample of $0.8214 \mathrm{g}$ of $\mathrm{KMnO}_{4}$ was dissolved in water and made up to the volume in a 500 -mL volumetric flask. A 2.000-mL sample of this solution was transferred to a $1000-\mathrm{mL}$ volumetric flask and diluted to the mark with water. Next, $10.00 \mathrm{mL}$ of the diluted solution were transferred to a $250-\mathrm{mL}$ flask and diluted to the mark with water. (a) Calculate the concentration (in molarity) of the final solution.
(b) Calculate the mass of $\mathrm{KMnO}_{4}$ needed to directly prepare the final solution.

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Raymond Chang, Kenneth A. Goldsby

Chemistry

Theodore Donnell

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Jacquelin Ho

Jake Rempel

This textbook answer is only visible when subscribed! Please subscribe to view the answer

Chemistry

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Raymond Chang, Kenneth A. GoldsbyChemistry

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Raymond Chang, Kenneth A. Goldsby

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