Practice - Selecting Wavelength and Preparing Calibration Curve
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Practice Questions
Test your understanding with targeted questions
Define λ_max.
💡 Hint: Think about what wavelength would give the strongest signal for a compound.
What is the purpose of a calibration curve?
💡 Hint: This curve connects measured values to concentrations.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does λ_max indicate?
💡 Hint: Think about which point on a graph would give you the highest value.
True or False: The calibration curve represents a direct linear relationship between absorbance and concentration.
💡 Hint: Consider the graphical representation of the data.
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Challenge Problems
Push your limits with advanced challenges
A standard calibration curve for a color solution has points (1 mg/L, 0.1 A) and (5 mg/L, 0.5 A). Calculate the slope and intercept of the best-fit line. Show your work.
💡 Hint: Draw the graph to visualize the relationships, and apply the slope-intercept formula.
An unknown sample shows an absorbance of 0.45 A at λ_max. If your calibration curve shows the equation A = 0.1C (where A is absorbance and C is concentration in mg/L), calculate the concentration of the unknown sample and propagate uncertainties.
💡 Hint: Look at both the slope and the absorbance value for calculations.
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