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Calculate the concentration of the unknown MnO4 sample, given the following standard addition experiment. Flask 1: A 2.00 mL aliquot of an unknown MnO4 sample was diluted to 100.0 mL and the absorbance measured to be 0.225. Flask 2: A 2.00 mL aliquot of an unknown MnO4 sample was placed in a 100.0 mL flask. A 2.00 mL aliquot of a 100.0 ppm MnO4 standard was added to the flask and the absorbance measured to be 0.646. Report your answer to one decimal place. Hint: 1) Remember the dilution factor 2) Yes you have enough information to solve this problem.

Calculate the concentration of the unknown MnO4 sample, given the following standard addition experiment. Flask 1: A 2.00 mL aliquot of an unknown MnO4 sample was diluted to 100.0 mL and the absorbance measured to be 0.225. Flask 2: A 2.00 mL aliquot of an unknown MnO4 sample was placed in a 100.0 mL flask. A 2.00 mL aliquot of a 100.0 ppm MnO4 standard was added to the flask and the absorbance measured to be 0.646. Report your answer to one decimal place. Hint: 1) Remember the dilution factor 2) Yes you have enough information to solve this problem.

Principles of Instrumental Analysis
Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Chapter9: Atomic Absorption And Atomic Fluorescence Spectrometry
Section: Chapter Questions
Problem 9.22QAP: The chromium in an aqueous sample was determined by pipetting 10.0 ml. of the unknown into each of...
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Calculate the concentration of the unknown MnO4 sample, given the following standard addition experiment. Flask 1: A 2.00 mL aliquot of an unknown MnO4 sample was diluted to 100.0 mL and the absorbance measured to be 0.225. Flask 2: A 2.00 mL aliquot of an unknown MnO4 sample was placed in a 100.0 mL flask. A 2.00 mL aliquot of a 100.0 ppm MnO4 standard was added to the flask and the absorbance measured to be 0.646. Report your answer to one decimal place. Hint: 1) Remember the dilution factor 2) Yes you have enough information to solve this problem.
Transcribed Image Text:Calculate the concentration of the unknown MnO4 sample, given the following standard addition experiment. Flask 1: A 2.00 mL aliquot of an unknown MnO4 sample was diluted to 100.0 mL and the absorbance measured to be 0.225. Flask 2: A 2.00 mL aliquot of an unknown MnO4 sample was placed in a 100.0 mL flask. A 2.00 mL aliquot of a 100.0 ppm MnO4 standard was added to the flask and the absorbance measured to be 0.646. Report your answer to one decimal place. Hint: 1) Remember the dilution factor 2) Yes you have enough information to solve this problem.
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