Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter4: Stoichiometry: Quantitative Information About Chemical Reactions
Section: Chapter Questions
Problem 77PS
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Question
what is the purpose y the result of Spectrophotometric of a Cobalt Chloride Solution Analysis?
Table 1 Absorption Spectrum of Cobalt Chloride Using a Spectrophotometer
Wavelength |
Absorbance |
400 410 420 430 440 450 460 370 480 490 500 510 520 530 540 550 560 570 580 590 600 610 620 630 640 650 660 670 680 690 700 |
0.036 0.044 0.063 0.095 0.147 0.215 0.284 0.329 0.362 0.402 0.450 0.479 0.464 0.398 0.314 0.216 0.142 0.087 0.054 0.041 0.036 0.036 0.034 0.028 0.030 0.023 0.023 0.023 0.014 0.014 0.011
|
Test Tube Number |
Cobalt Chloride Concentration (mol/mL) |
Absorbance at 510 nm |
|
|
|
1 |
0.000 |
0.000 |
2 |
0.009 |
0.042 |
3 |
0.018 |
0.92 |
4 |
0.027 |
0.139 |
5 6 |
0.036 0.045 |
0.190 0.236 |
7 |
(Unknown) |
0.151
|
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