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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is dilution?
💡 Hint: Think about mixing a concentrated juice with water.
Question 2
Easy
Why is concentration necessary?
💡 Hint: Consider situations where things are too diluted to measure.
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 purpose of dilution in analytical chemistry?
- To increase the analyte concentration
- To reduce the concentration
- To separate substances
💡 Hint: Recall the example of making juice less strong.
Question 2
Is solvent extraction a method to concentrate analytes?
- True
- False
💡 Hint: Consider what happens when you separate oils from water.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have a 500 mg/L solution of an analyte, and you need to dilute it to 50 mg/L. How much of the solution do you need to take and how much water do you need to add?
💡 Hint: Use the dilution equation again.
Question 2
After extracting an analyte, you measure its concentration as 2.5 mg/L in a 5 mL extract. What was the original concentration in a 1 L sample if the recovery rate during extraction was 85%?
💡 Hint: Remember to adjust for the recovery rate.
Challenge and get performance evaluation