At 0o C the solubility of caffeine in water is 0.022 g/mL. This means that for every mL of water, 0.022 g of caffeine will dissolve. A student wanted to separate a heterogeneous mixture which is having the 4.0 g caffeine and 2.0 g of NaCl. She added 100 mL of water to dissolve all of the salt and cooled the mixture to 0o C.
1. Explain how much caffeine dissolved in the water?
2. Determine the maximum percent recovery for caffeine?
3. What could the student do next time to maximize her percent recover for the caffeine?