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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a calibration curve?
💡 Hint: Think about how light absorption relates to concentration.
Question 2
Easy
What does molar absorptivity (ε) represent?
💡 Hint: Consider the unit L mol⁻¹ cm⁻¹.
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 a calibration curve plot?
- Amount of solute vs. time
- Absorbance vs. concentration
- Concentration vs. path length
💡 Hint: Consider the relationship between light absorption and concentration.
Question 2
True or False: Molar absorptivity is constant for all concentrations.
- True
- False
💡 Hint: Think about how absorption might change at higher concentrations.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
If you prepared a calibration curve with the following concentrations and measured absorbances: 1.00 mg/L (0.102), 2.00 mg/L (0.204), 6.00 mg/L (0.610), and 8.00 mg/L (0.812). Using a linear regression fit, what is the derived equation, and how would you calculate the concentration of an unknown with an absorbance of 0.550?
💡 Hint: Use the slope from your calculations to find the unknown concentration.
Challenge and get performance evaluation