Answered: Using the stock solution above, the…

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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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.

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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