LAB 4 STEAM DISTUATION OF OH.) CARVONE FROM CARAWAY SEEDS AND CRH-CAR ONE \'ROM

Question

LAB 4 STEAM DISTUATION OF OH.) CARVONE FROM CARAWAY SEEDS AND CRH-CAR ONE 'ROM SPARMINT LEAVES LAB 4 DATE LAB SECTION Answer the following questions in the pre-lab section of your notebook. 1. Of carvone and water, which compound will have the higher Po? Which compound has the higher boiling point? Do you expect carvone to be soluble in water? Why or why not? 2. Model: For this question, you will be graded on completion, rather than correctness of the model. In the post-lab, you will be asked to evaluate your original model based on what you experience in lab. Be sure to label your model and describe what each representation means, if necessary. Based on your answers to question 1 and 2, draw a diagram that models what happens when a mixture of carvone and water begins to boil (you can pretend that the solution is in a round-bottom flask for your picture). In your diagram, include a macroscopic picture of the chemical composition of the liquid and vapor phases, including any changes in compo- 3. sition. For simplicity's sake, assume you have 1 molecule of carvone for every 5 molecules of water

Explanation / Answer

1) Carvone is a terpenoid ,which is highly volatile.

At normal temperature,

Vapor pressure of pure carvone=Po=8.55*10^-2 mmHg

vapor pressure of water=Pow=23.8 mmHg

Thus po for water >po for carvone

Carvone has higher boiling point than water.It is insoluble in water.as it is an organic compound (non-polar) ,so does not dissolve in polar aqueous solvent.

B.pt of water=100 degree C

B.pt of carvone=227 degree C

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