Your task is to carry out a workup to separate the aspirin from a 1g sample of analgesic tablets (main components aspirin and caffeine). You will need to: perform a base extraction, and recovery into organic solvent, using a separating funnel remove water from a solution in organic solvent by washing with brine, then using a solid drying agent confirm the separation of aspirin by TLC Available in the lab are: O OH N . N N Dichloromethane Saturated aqueous sodium chloride (brine) 2M hydrochloric acid 10wt% aqueous sodium bicarbonate 2M aqueous sodium hydroxide Magnesium sulphate (anhydrous) Aspirin Caffeine Questions to consider: 1. How much dichloromethane should you use to dissolve your analgesic powder? Options: 1-2 drops; 25 mL; 200 mL 2. Should you use the sodium bicarbonate solution or the sodium hydroxide solution to perform your base extraction? 3. How many extractions should you do? Options: one; three; twelve 4. How much solution should you use each time? Options: 2 ml; 20 mL; 200 mL 5. What compound(s) is/are in each layer after the base extraction? To recover the aspirin into organic solvent you will need to: convert the sodium salt of aspirin, now dissolved in the aqueous layer, back to aspirin add fresh organic solvent to dissolve the aspirin 6. Which two of the following should you add, and in what order? Options: 20 mL brine; 40 mL sodium hydroxide; 40 mL hydrochloric acid; 20 mL dichloromethane; 2 g magnesium sulphate 7. What compound(s) is/are in each layer after the recovery into organic solvent