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3 cards from this section. Quick, good the night before a test.
What is dilution?
Think about mixing a concentrated juice with water.
Why is concentration necessary?
Consider situations where things are too diluted to measure.
What is the purpose of dilution in analytical chemistry?
Recall the example of making juice less strong.
Is solvent extraction a method to concentrate analytes?
Consider what happens when you separate oils from water.
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?
Use the dilution equation again.
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%?
Remember to adjust for the recovery rate.
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