Practice HL: Spectrophotometry and Beer-Lambert Law - 1.5 | Chapter 1: Stoichiometric Relationships | IB Grade 12-Chemistry
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1.5 - HL: Spectrophotometry and Beer-Lambert Law

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

Define absorbance in the context of spectrophotometry.

💡 Hint: Think about light interaction with the solution.

Question 2

Easy

What is the formula of the Beer-Lambert Law?

💡 Hint: What relationship does absorbance represent?

Practice 4 more questions and get performance evaluation

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.

💡 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

💡 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 dm⁻³ respectively. If an unknown sample has an absorbance of 0.25, what is its concentration?

💡 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 dm⁻³. What could account for this anomaly?

💡 Hint: Consider what happens to light passage in concentrated solutions.

Challenge and get performance evaluation