1. Look up the solubility properties of caffeine and determine how many grams of caffeine will dissolve 100 g of water at 100 *C. Show your calculation.
(If you don't know the solubility of those things, just leave it as X with the equation)
2. How much caffeine should crystallize out at room temperature from the above solution? Show your calculations
3. Silica gel is insoluble in water. Explain.