Practice UV-Visible Spectrophotometry - 3.2 | Unit 11: Measurement and Data Processing | IB Grade 11: Chemistry
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Knowledge

3.2 - UV-Visible Spectrophotometry

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What does UV-Visible Spectrophotometry measure?

💡 Hint: Think about the interaction between light and substances.

Question 2

Easy

What is the Beer-Lambert Law?

💡 Hint: It connects absorbance (A), molar absorptivity (ε), concentration (c), and path length (ℓ).

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 UV-Visible Spectrophotometry primarily measure?

  • The color of a solution
  • The absorbance of light
  • The temperature of a sample

💡 Hint: Consider what the primary focus of the instrument is.

Question 2

True or False: The Beer-Lambert Law states that absorbance is independent of concentration.

  • True
  • False

💡 Hint: Think about how absorbance is affected by how much of a substance is present.

Solve and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

You have a dye with a molar absorptivity of 200 L/(mol·cm) and a cuvette path length of 1 cm. If the absorbance of the solution is 0.8, calculate the concentration of the dye.

💡 Hint: Make sure to rearrange the Beer-Lambert Law formula.

Question 2

An analytical chemist prepares a calibration curve and finds a linear relationship between absorbance and concentration. Discuss how they would determine if their findings are valid and reliable.

💡 Hint: Think about the importance of repeatability in experiments.

Challenge and get performance evaluation