2. Referring to the colorimeter in this experiment, if a sample transmits sufficient light to cause a current of 488 microamperes in the photocell compared to a blank solution that allows a current of 622 microamperes, what is the %Transmittance of the solution? 3. What would the Absorbance value be for the solution in problem #2?

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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Illinois Central College
CHEMISTRY 130
PRELAB: Exp.11 Beer's Law
Name:
SHOW YOUR WORK
Exercise 11 Page 9
1. A substance that absorbs light at 495 nm appears to have what color? (refer to Table 1.)
2. Referring to the colorimeter in this experiment, if a sample transmits sufficient light to cause a current
of 488 microamperes in the photocell compared to a blank solution that allows a current of 622
microamperes, what is the %Transmittance of the solution?
3. What would the Absorbance value be for the solution in problem #2?
4. Why does the procedure for measuring the concentration of a solution photometrically require
the use of a "blank"?
Transcribed Image Text:Illinois Central College CHEMISTRY 130 PRELAB: Exp.11 Beer's Law Name: SHOW YOUR WORK Exercise 11 Page 9 1. A substance that absorbs light at 495 nm appears to have what color? (refer to Table 1.) 2. Referring to the colorimeter in this experiment, if a sample transmits sufficient light to cause a current of 488 microamperes in the photocell compared to a blank solution that allows a current of 622 microamperes, what is the %Transmittance of the solution? 3. What would the Absorbance value be for the solution in problem #2? 4. Why does the procedure for measuring the concentration of a solution photometrically require the use of a "blank"?
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