Question

In
organic lab, we did a steam distillation of the essential oil of
caraway oil. In the post questions it asks for some calculation I
don't understand how to get.

First ---> calculate the percent of essential oil based on
the mass of caraway oil used (caraway oil used was 2.038
grams)

Second ----> assuming the reaction is quantitative, the
amount of carvone originally in the extracted oil can be
calculated. The amount of limonene in the oil can then be
determined by subtracting the mass of the carvone calculate above
from the mass of essential oil determined in the preceding
paragraph. Calculate the % of each substance, limonene and carvone
based on the mass of caraway oil used.

Third ---> what would be typical mass of essential oil used
in this experiment if you started out in your mixture with ( 2
grams of caraway oil in 50 ml of water)

Answer #1

Method for calculation

First : percent essential oil in caraway oil = (amount of oil extracted/mass of caraway oil started with) x 100

Second : Carvone is higher boiling fraction and limonene is the lower boiling fraction of the extract

percent carvone = (mass of higher boiling fraction/mass of essential oil extracteed from caraway oil) x 100

percent limonene = (mass of lower boiling fraction/mass of essential oil extracteed from caraway oil) x 100

Third : From first we have mass of extracted esential oil from a known quantity of caraway oil

So we can easily find the mass of essential oil to be extracted from say 2 g of caraway oil by ratio proportion method.

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