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D a 14. The unknown tablet is prepared for analysis in two steps. The tablet is crushed into a powder and then dissolved into a 250 mL volumetric flask with dilute acetic acid. A diluted powder solution is prepared by transferring 25.00 mL of the original powder solution into a 50 mL volumetric flask and diluting to volume with dilute acetic acid. Then 1.00 mL of the diluted powder solution is added to each of the standard addition flasks; each flask has a total volume of 10.00 mL. The unknown's riboflavin concentration in the standard addition solutions is determined to be 1.41 ppm. What is the riboflavin concentration (ppm) in the unknown powder solution? 2.82 21.2 14.1 28.2

D a 14. The unknown tablet is prepared for analysis in two steps. The tablet is crushed into a powder and then dissolved into a 250 mL volumetric flask with dilute acetic acid. A diluted powder solution is prepared by transferring 25.00 mL of the original powder solution into a 50 mL volumetric flask and diluting to volume with dilute acetic acid. Then 1.00 mL of the diluted powder solution is added to each of the standard addition flasks; each flask has a total volume of 10.00 mL. The unknown's riboflavin concentration in the standard addition solutions is determined to be 1.41 ppm. What is the riboflavin concentration (ppm) in the unknown powder solution? 2.82 21.2 14.1 28.2

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Analysis of Unknown Tablet for Riboflavin Concentration:** The unknown tablet is prepared for analysis in two steps: 1. **Powder Preparation and Initial Dilution:** - The tablet is crushed into a powder and dissolved in a 250 mL volumetric flask using dilute acetic acid. - A diluted powder solution is created by transferring 25.00 mL of the original powder solution into a 50 mL volumetric flask, then diluted to volume using dilute acetic acid. 2. **Standard Addition Preparation:** - 1.00 mL of the diluted powder solution is added to each standard addition flask; each flask has a total volume of 10.00 mL. The riboflavin concentration in the standard addition solutions is determined to be 1.41 ppm. The task is to find the riboflavin concentration (ppm) in the unknown powder solution. **Multiple Choice Answers:** - A. 2.82 - B. 21.2 - C. 14.1 - D. 28.2 **Explanation:** This problem involves the preparation and dilution of a sample for analysis using volumetric flasks. Each step reduces or maintains the concentration for accurate analysis of riboflavin content. Understanding how to calculate the resultant concentration from these operations is crucial in quantitative analysis.
Transcribed Image Text:**Analysis of Unknown Tablet for Riboflavin Concentration:** The unknown tablet is prepared for analysis in two steps: 1. **Powder Preparation and Initial Dilution:** - The tablet is crushed into a powder and dissolved in a 250 mL volumetric flask using dilute acetic acid. - A diluted powder solution is created by transferring 25.00 mL of the original powder solution into a 50 mL volumetric flask, then diluted to volume using dilute acetic acid. 2. **Standard Addition Preparation:** - 1.00 mL of the diluted powder solution is added to each standard addition flask; each flask has a total volume of 10.00 mL. The riboflavin concentration in the standard addition solutions is determined to be 1.41 ppm. The task is to find the riboflavin concentration (ppm) in the unknown powder solution. **Multiple Choice Answers:** - A. 2.82 - B. 21.2 - C. 14.1 - D. 28.2 **Explanation:** This problem involves the preparation and dilution of a sample for analysis using volumetric flasks. Each step reduces or maintains the concentration for accurate analysis of riboflavin content. Understanding how to calculate the resultant concentration from these operations is crucial in quantitative analysis.
Expert Solution
Step 1

The formula of dilution is 

C1V1 = C2V2

Where, C1 and C2 are initial and final concentrations of the solutions. 

V1 and V2 are intial and final volumes of the solutions.

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