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Capturing Flower Fragrance
Age 14 · Chemistry
Flower petals hold fragrant oils and scent molecules. Two lab methods can pull them out: one uses a solvent, and the other uses steam.
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In the picture
- Glass tank: transparent container holding rose petals and solvent
- Solvent surface: colorless liquid surrounding the rose petals
- Copper alembic: rounded vessel holding lavender and steam
- Condenser coil: spiral tube cooled in water, turning vapor into liquid
- Oil-water boundary in the receiving flask: yellow oil floating on clear water
Examples
- Vanilla extract is made by soaking vanilla beans in alcohol.
- Lavender essential oil can be collected by passing steam through lavender and cooling the vapor.
Key takeaways
- A solvent can dissolve scent molecules out of petals.
- Steam distillation uses heat and condensation to separate volatile oils from water.
Quiz: Capturing Flower Fragrance (Age 14)
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In the solvent method, what does the solvent do to the flower petals?
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What does steam distillation use to separate volatile oils from water?
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What is the job of the condenser coil?
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