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10 Cards in this Set
- Front
- Back
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What mixture was separated using fractional distillation? |
Acetone and 1-propanol |
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When is fractional distillation used? |
Separate liquids with boiling point differences less than 50 degrees Celsius |
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What is the purpose of raschig rings inside the Hempel column? |
Increases the surface area, which increases the number of theoretical plates and thus better separation |
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What does the Hempel column with the raschig rings establish? |
Temperature gradient |
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What takes place inside of the Hempel column? |
Many vaporization/condensation cycles |
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What does one vaporization/condensation cycle represent? |
One theoretical plate |
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What are the 4 factors that affect theoretical plates? |
1. Temperature gradient 2. Surface area (increase = higher plate count) 3. Column length (increase = higher plate count) 4. Rate of gas flow |
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What does a low HETP represent? |
Less height needed for 1 N which means more efficient the column |
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Does fractional or simple distillation have a steeper slope in its temperature vs. volume graph? |
Fractional distillation |
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End |
End |
