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9 Cards in this Set
- Front
- Back
What types of substance is steam distillation applicable too? 4
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are immiscible with water
non-reactive with water stable at 100 degrees C have a vapor pressure greater than 5 Torr at 100 degrees C |
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How was steam generated in this experiment?
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direct heating in situ
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What is used to extract the distillate?
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methylene chloride
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Why shouldn't you shake the seperatory funnel vigorously during extraction?
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may produce a stable emulsion where the layers separate slowly
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Why is Na2SO4 used?
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to remove excess water
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Equation to determine partial pressure of water in steam distillation?
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P(H2O) = 760 Torr - (vapor pressures of components)
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How to calculate the amount of carvone that will distill out for every 1g of water that co distills?
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g carvone/g water = (P carvone)(MW carvone)/(P water)(MW water)
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What is the maximum boiling point for steam distillation?
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the max temp. is always less than the boiling point of water because the heterogeneous mixture is immiscible
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Advantages of Steam Distillation? 3
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-distill liquids with high boiling points at temperature less than 100 degrees Celsius
-avoid high temp which could cause decomposition -can use vacuum distillation as an alternative |