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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is liquid-liquid extraction?
💡 Hint: Think about the process of transferring a substance.
Question 2
Easy
Name a key factor in solvent selection for extraction.
💡 Hint: Consider how two liquids interact with each other.
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 is the main purpose of liquid-liquid extraction?
- To dilute a sample
- To concentrate an analyte
- To analyze water directly
💡 Hint: Think about why extraction is performed.
Question 2
True or False: A solvent must be miscible with water for effective liquid-liquid extraction.
- True
- False
💡 Hint: Recall the definitions of miscibility.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You need to analyze a chemical in water from a polluted river. The analytical instrument's detection limit is 1 mg/L, but your samples show concentrations around 0.2 mg/L. How would you ensure the analyte is detectable?
💡 Hint: Think about how extraction can amplify very low concentrations.
Question 2
If a recovery test shows you recover only 75% of an added analyte during extraction, but your instrument measures 10 mg/L in the final sample, what is the actual concentration in the solution before the extraction?
💡 Hint: Consider the impacts of recovery rate on the initial concentration.
Challenge and get performance evaluation