Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define absorbance in the context of spectrophotometry.
π‘ Hint: Think about light interaction with the solution.
Question 2
Easy
What is the formula of the Beer-Lambert Law?
π‘ Hint: What relationship does absorbance represent?
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Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does the Beer-Lambert Law state?
- Absorbance is independent of concentration.
- Absorbance is proportional to concentration.
- Absorbance is unrelated to light distance.
π‘ Hint: Remember the key variables in the Beer-Lambert Law.
Question 2
True or False: Molar absorptivity is the same for all substances.
- True
- False
π‘ Hint: Think about how different substances absorb light.
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Challenge Problems
Push your limits with challenges.
Question 1
A researcher prepares a calibration curve for a dye solution, yielding absorbance values of 0.1, 0.2, and 0.3 for concentrations of 0.01, 0.02, and 0.03 mol dmβ»Β³ respectively. If an unknown sample has an absorbance of 0.25, what is its concentration?
π‘ Hint: How can you use the known concentrations to determine the unknown?
Question 2
During an experiment, deviations from the Beer-Lambert Law were noted at a concentration above 0.05 mol dmβ»Β³. What could account for this anomaly?
π‘ Hint: Consider what happens to light passage in concentrated solutions.
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