Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
|
What is the goal of this lab experiment? |
Isolate carvone from caraway seeds and spearmint leaves |
|
|
Why is steam distillation important? |
It is used to isolate oils and liquids with high boiling points |
|
|
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 |
|
|
What is happening to the volatile components in the caraway seeds/spearmint leaves? |
Co-distilling with the water vapor |
|
|
Why will the distillate be cloudy? |
Due to the carvone and water being immiscible |
|
|
Are methylene chloride and water immiscible? |
Yes |
|
|
Is carvone soluble in methylene chloride? |
Yes |
|
|
What does immiscible mean? |
Not soluble in all proportions |
|
|
What is special about the total vapor pressure? |
Always higher than the most volatile component |
|
|
What is the most volatile component in steam distillation? |
Water |
|
|
What is special about the boiling point of the mixture? |
Always lower than the lowest boiling point component (water at 100 degrees celsius) |
|
|
What are the three techniques that can be used to analyze isolated oil? |
1. Thin-layer chromatography 2. Baeyer Test 3. Smell |
|
|
(R)-carvone and (S)-carvone are enantiomers. What does it mean to be enantiomers? |
Non-superimposible mirror images |
|
|
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) |
|
|
End |
End |
