A calibration graph was established with a slope of 0.36 and an intercept of 0.081. The absorbance of an unknown was measured as 0.414. What is the concentration of this unknown?
A calibration graph was established with a slope of 0.36 and an intercept of 0.081. The absorbance of an unknown was measured as 0.414. What is the concentration of this unknown?
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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Question
A calibration graph was established with a slope of 0.36 and an intercept of 0.081. The absorbance of an unknown was measured as 0.414. What is the concentration of this unknown?
Expert Solution
Introduction
Absorbance of a substance is the fraction of the intensity of radiation it absorbed.
According to Beer-Lamberts law, the absorbance of a solution is directly proportional to the intensity of incident radiation and the concentration of the solution.
A plot of absorbance versus concentration gives a straight line.
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