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9. ou wish to adapt the AA method to measure the amount of iron in leaf tissues. Theminimum amount of iron in the tissues is expected to be about 0.0025% by mass. Theminimum concentration for AA measurements is 0.30 ppm (using a slightly more sensitivemethod than the one you used). Your plan is to weigh out 6.0 g leaf tissue samples, digest them in acid, filter and dilute them to 50 ml. This solution is your "Sample Stock Solution." You will then pipet a portion of this solution into a 25-ml volumetric flask and dilute to volume. This solution is your "Diluted Sample Solution," and you will make your AA measurements on this solution. a. How many milligrams of Fe are there in 6.025 g of a leaf tissue that is 0.0025% iron by mass? (Note: 0.0025% by mass = 0.0025 g Fe per 100 g sample.) b. If all of the iron from Question 1 is diluted in a 50-mL flask (Sample Stock Solution), what is the concentration, in ppm, of the resulting solution? c. What volume of the Sample Stock Solution (from Question 2) is needed to prepare 25.0 mL of a Dilute Sample Solution with a concentration of 0.30 ppm Fe?

9. ou wish to adapt the AA method to measure the amount of iron in leaf tissues. Theminimum amount of iron in the tissues is expected to be about 0.0025% by mass. Theminimum concentration for AA measurements is 0.30 ppm (using a slightly more sensitivemethod than the one you used). Your plan is to weigh out 6.0 g leaf tissue samples, digest them in acid, filter and dilute them to 50 ml. This solution is your "Sample Stock Solution." You will then pipet a portion of this solution into a 25-ml volumetric flask and dilute to volume. This solution is your "Diluted Sample Solution," and you will make your AA measurements on this solution. a. How many milligrams of Fe are there in 6.025 g of a leaf tissue that is 0.0025% iron by mass? (Note: 0.0025% by mass = 0.0025 g Fe per 100 g sample.) b. If all of the iron from Question 1 is diluted in a 50-mL flask (Sample Stock Solution), what is the concentration, in ppm, of the resulting solution? c. What volume of the Sample Stock Solution (from Question 2) is needed to prepare 25.0 mL of a Dilute Sample Solution with a concentration of 0.30 ppm Fe?

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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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I don't know how to calculate parts a, b &c of question 9.

Replicate 1 Replicate 2 7.192 7.234 Diluted sample solution Fe conc (ppm) 179.8 180.9 Sample stock solution Fe conc (ppm) Mass Fe in table (mg) 44.73 45.21 Average mass Fe in table (mg) 44.95 Application Questions 9. ou wish to adapt the AA method to measure the amount of iron in leaf tissues. Theminimum amount of iron in the tissues is expected to be about 0.0025% by mass. Theminimum concentration for AA measurements is 0.30 ppm (using a slightly more sensitivemethod than the one you used). Your plan is to weigh out 6.0 g leaf tissue samples, digest them in acid, filter and dilute them to 50 ml. This solution is your "Sample Stock Solution." You will then pipet a portion of this solution into a 25-ml volumetric flask and dilute to volume. This solution is your "Diluted Sample Solution," and you will make your AA measurements on this solution. a. How many milligrams of Fe are there in 6.025 g of a leaf tissue that is 0.0025% iron by mass? (Note: 0.0025% by mass = 0.0025 g Fe per 100 g sample.) b. If all of the iron from Question 1 is diluted in a 50-mL flask (Sample Stock Solution), what is the concentration, in ppm, of the resulting solution? c. What volume of the Sample Stock Solution (from Question 2) is needed to prepare 25.0 ml of a Dilute Sample Solution with a concentration of 0.30 ppm Fe?
Transcribed Image Text:Replicate 1 Replicate 2 7.192 7.234 Diluted sample solution Fe conc (ppm) 179.8 180.9 Sample stock solution Fe conc (ppm) Mass Fe in table (mg) 44.73 45.21 Average mass Fe in table (mg) 44.95 Application Questions 9. ou wish to adapt the AA method to measure the amount of iron in leaf tissues. Theminimum amount of iron in the tissues is expected to be about 0.0025% by mass. Theminimum concentration for AA measurements is 0.30 ppm (using a slightly more sensitivemethod than the one you used). Your plan is to weigh out 6.0 g leaf tissue samples, digest them in acid, filter and dilute them to 50 ml. This solution is your "Sample Stock Solution." You will then pipet a portion of this solution into a 25-ml volumetric flask and dilute to volume. This solution is your "Diluted Sample Solution," and you will make your AA measurements on this solution. a. How many milligrams of Fe are there in 6.025 g of a leaf tissue that is 0.0025% iron by mass? (Note: 0.0025% by mass = 0.0025 g Fe per 100 g sample.) b. If all of the iron from Question 1 is diluted in a 50-mL flask (Sample Stock Solution), what is the concentration, in ppm, of the resulting solution? c. What volume of the Sample Stock Solution (from Question 2) is needed to prepare 25.0 ml of a Dilute Sample Solution with a concentration of 0.30 ppm Fe?
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