(Answered) 1a what is the chemical structure of caffeine what

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1a. What is the chemical structure of caffeine? What structural features make it soluble in water, and in ethyl acetate?

b. The solubility of caffeine is 2.2mg/ml at 25⁰C, 180mg/ml at 80^oC, and 670mg/ml at 100^oC. Why does the solubility change with temperature?

c. Using the information given in question 3, comment on the "wake you up" capability of iced tea.

d. Why did we do three extractions with ethyl acetate versus only one?

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