Part C The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted by using a pipette to take 100.0 µL of the sample and injecting it into a cuvette already containing 2.00 mL of water (total volume is 2.00 mL + 100.0 µL). The absorbance value of the diluted solution corresponded to a concentration of 9.29x106 M. What was the concentration of the original solution? Express the concentration to three significant figures with the appropriate units. > View Available Hint(s) ? original concentration of Fe2+ = Value Units Submit
Part C The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted by using a pipette to take 100.0 µL of the sample and injecting it into a cuvette already containing 2.00 mL of water (total volume is 2.00 mL + 100.0 µL). The absorbance value of the diluted solution corresponded to a concentration of 9.29x106 M. What was the concentration of the original solution? Express the concentration to three significant figures with the appropriate units. > View Available Hint(s) ? original concentration of Fe2+ = Value Units Submit
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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Transcribed Image Text:In order to understand how this equation is derived and why it holds true, the product of each side of the equation should be examined. What value and unit do you get when you multiply a concentration of
0.514 Mby a volume of 0.100 L? This question can be expressed as
0.100 L x 0.514 mol
1
Express your answer to three significant figures with the appropriate units.
• View Available Hint(s)
HẢ
?
M1V1 =
Value
Units
%3D
Submit
Part B
When you need to produce a variety of diluted solutions of a solute, you can dilute a series of stock solutions. A stock solution has a significantly higher concentration of the given solute (typically 10' to 104
times higher than those of the diluted solutions). The high concentration allows many diluted solutions to be prepared using minimal amounts of the stock solution.
What volume of a 6.56 M stock solution do you need to prepare 500. mL of a 0.0842 M solution of KC?
Express the volume to three significant figures with the appropriate units.
• View Available Hint(s)
HẢ
?
Vi =
Value
Units
%3D

Transcribed Image Text:Part C
The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted by using
a pipette to take 100.0 µL of the sample and injecting it into a cuvette already containing 2.00 mL of water (total volume is 2.00 mL + 100.0 µL). The absorbance value of the diluted solution corresponded
to a concentration of 9.29x10-6 M. What was the concentration of the original solution?
Express the concentration to three significant figures with the appropriate units.
• View Available Hint(s)
HẢ
?
original concentration of Fe2+
Value
Units
%3D
Submit
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