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9 Cards in this Set

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  • Back
What types of substance is steam distillation applicable too? 4
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
How was steam generated in this experiment?
direct heating in situ
What is used to extract the distillate?
methylene chloride
Why shouldn't you shake the seperatory funnel vigorously during extraction?
may produce a stable emulsion where the layers separate slowly
Why is Na2SO4 used?
to remove excess water
Equation to determine partial pressure of water in steam distillation?
P(H2O) = 760 Torr - (vapor pressures of components)
How to calculate the amount of carvone that will distill out for every 1g of water that co distills?
g carvone/g water = (P carvone)(MW carvone)/(P water)(MW water)
What is the maximum boiling point for steam distillation?
the max temp. is always less than the boiling point of water because the heterogeneous mixture is immiscible
Advantages of Steam Distillation? 3
-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