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15 Cards in this Set
- Front
- Back
What is the goal of this lab experiment? |
Isolate carvone from caraway seeds and spearmint leaves |
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Why is steam distillation important? |
It is used to isolate oils and liquids with high boiling points |
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What are the 4 important requirements of steam distillation? |
1. Non-reactive with water 2. Immiscible with water 3. Stable at 100 degrees celsius 4. Pressure is greater than or equal to 5 Torr at 100 degrees celsius |
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What is happening to the volatile components in the caraway seeds/spearmint leaves? |
Co-distilling with the water vapor |
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Why will the distillate be cloudy? |
Due to the carvone and water being immiscible |
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Are methylene chloride and water immiscible? |
Yes |
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Is carvone soluble in methylene chloride? |
Yes |
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What does immiscible mean? |
Not soluble in all proportions |
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What is special about the total vapor pressure? |
Always higher than the most volatile component |
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What is the most volatile component in steam distillation? |
Water |
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What is special about the boiling point of the mixture? |
Always lower than the lowest boiling point component (water at 100 degrees celsius) |
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What are the three techniques that can be used to analyze isolated oil? |
1. Thin-layer chromatography 2. Baeyer Test 3. Smell |
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(R)-carvone and (S)-carvone are enantiomers. What does it mean to be enantiomers? |
Non-superimposible mirror images |
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What is the one property that differs in enantiomers? |
How they interact with plan polarized light (enantiomers rotate the plane of the light the same magnitude, but in opposite directions) |
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End |
End |