Using the stock solution above, the student made additional dilutions, with the final volumes below. Calculate the concentration of iron(III) thiocyanate ion in Standard 2. For grading purposes, report your answer in mM with four places after the decimal.
Using the stock solution above, the student made additional dilutions, with the final volumes below. Calculate the concentration of iron(III) thiocyanate ion in Standard 2. For grading purposes, report your answer in mM with four places after the decimal.
Chemistry for Today: General, Organic, and Biochemistry
9th Edition
ISBN:9781305960060
Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Publisher:Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Chapter7: Sollutions And Colloids
Section: Chapter Questions
Problem 7.25E
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During lab, a student used a Mohr pipet to add the following solutions into a 25 mL volumetric flask. They calculated the final volumes added, which are recorded below. The student then followed the directions in the manual to make the stock solution.
Volumes Used to Create Stock Solution
| Volume 0.200 M Fe(NO3)3 (mL) | Volume 0.00200 M KSCN (mL) | |
|---|---|---|
| Stock Solution | 9.60 mL | 2.55 mL |
Using the stock solution above, the student made additional dilutions, with the final volumes below. Calculate the concentration of iron(III) thiocyanate ion in Standard 2. For grading purposes, report your answer in mM with four places after the decimal.
Transcribed Image Text:Volumes Used to Create Standard Solutions
Solution Volume Stock solution (mL) Volume Water (mL)
Standard 1
3.15
5.05
6.76
9.17
Standard 2
Standard 3
Standard 4
7.01
5.11
2.85
1.10
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