Water from Jordan Lake was analyzed for its Fe³+ content. A 20.0-mL sample of lake water was acidified with nitric acid and treated with excess KSCN to form a red complex (KSCN itself is colorless). The solution was then diluted to 50.0-mL and put in a 1.00 cm pathlength cell, where it yielded an absorbance of 0.345. For comparison, a 5.0-mL reference sample of 4.80 x 10 4 M Fe³+ was treated with HNO3 and KSCN and diluted to 50.0 mL. The reference solution was also placed in a 1.00-cm cell and gave an absorbance of 0.512. What is the concentration of Fe³+ in Jordan Lake? A. 9.16 x 10-4 M B. 4.58 x 10-5 M C. 6.80 x 10-5 M D. 2.29 x 10-5 M E. 1.14 x 10-4 M F. 8.09 x 10-5 M G. 1.77 x 10-4 M OH. 8.46 x 10-4 M
Water from Jordan Lake was analyzed for its Fe³+ content. A 20.0-mL sample of lake water was acidified with nitric acid and treated with excess KSCN to form a red complex (KSCN itself is colorless). The solution was then diluted to 50.0-mL and put in a 1.00 cm pathlength cell, where it yielded an absorbance of 0.345. For comparison, a 5.0-mL reference sample of 4.80 x 10 4 M Fe³+ was treated with HNO3 and KSCN and diluted to 50.0 mL. The reference solution was also placed in a 1.00-cm cell and gave an absorbance of 0.512. What is the concentration of Fe³+ in Jordan Lake? A. 9.16 x 10-4 M B. 4.58 x 10-5 M C. 6.80 x 10-5 M D. 2.29 x 10-5 M E. 1.14 x 10-4 M F. 8.09 x 10-5 M G. 1.77 x 10-4 M OH. 8.46 x 10-4 M
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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![Water from Jordan Lake was analyzed for its Fe³+ content. A 20.0-mL sample of lake water was acidified with nitric acid and
treated with excess KSCN to form a red complex (KSCN itself is colorless). The solution was then diluted to 50.0-mL and put in
a 1.00 cm pathlength cell, where it yielded an absorbance of 0.345. For comparison, a 5.0-mL reference sample of 4.80 x 10
¹ M Fe³+ was treated with HNO3 and KSCN and diluted to 50.0 mL. The reference solution was also placed in a 1.00-cm cell and
gave an absorbance of 0.512. What is the concentration of Fe³+ in Jordan Lake?
4
A. 9.16 x 10-4 M
B. 4.58 x 10-5 M
C. 6.80 x 10-5 M
D. 2.29 x 10-5 M
E. 1.14 x 10-4 M
F. 8.09 x 10-5 M
G. 1.77 x 10-4 M
H. 8.46 x 10-4 M](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F70774868-ea05-4fa3-ae6c-7ea4e68d506a%2F70a93629-1c23-44a6-846b-b7446edc329c%2F7njuk9_processed.png&w=3840&q=75)
Transcribed Image Text:Water from Jordan Lake was analyzed for its Fe³+ content. A 20.0-mL sample of lake water was acidified with nitric acid and
treated with excess KSCN to form a red complex (KSCN itself is colorless). The solution was then diluted to 50.0-mL and put in
a 1.00 cm pathlength cell, where it yielded an absorbance of 0.345. For comparison, a 5.0-mL reference sample of 4.80 x 10
¹ M Fe³+ was treated with HNO3 and KSCN and diluted to 50.0 mL. The reference solution was also placed in a 1.00-cm cell and
gave an absorbance of 0.512. What is the concentration of Fe³+ in Jordan Lake?
4
A. 9.16 x 10-4 M
B. 4.58 x 10-5 M
C. 6.80 x 10-5 M
D. 2.29 x 10-5 M
E. 1.14 x 10-4 M
F. 8.09 x 10-5 M
G. 1.77 x 10-4 M
H. 8.46 x 10-4 M
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