Question

Paragraph . 1マーに 1 HTTL 2 | x' x, | so ea l E 1ヨ回ドもデ. | 2m 규亨ー过1K % Yield g aspirin obtained/ g aspirin calculated x 100 1. Mass of empty Erlenmeyer Flask,EF 2. Mass of EFsalicylic acid 3. Mass of EF+sslicylic acid + acetic anhydride 4. Mass of E 5. Calculate mass of salicylic acid used 8. Calculate mass of acetic anhydride used 7. Calculate mass of aspirin made (actual yield) Part 1 Synthesis of Aspirin: Empty Flask 88.000g add 2 g of Salicyclic acid 90.000g 1.4mL add 25mL acetu anhydrine 117.000g 26.4mL - white substance formed add 2 mL Sulfuric acid 120.046g 28.4mL water bath 1000C add 15mL of water 135.046g 43.4mL water bath 0C crystalized 90.575g 1.9mL Part 2 Test Tube #1 0.1g acely!salicylic-turned yellow Test Tube #2 0.1g salicylic-turned brownish red Test Tube #3 crystals-turned yellow Test Tube # 4 - iron (III) chloride is a yellow solution - iron (III) chloride reacts with phenol: brownish red - salicylic is a phenol reacts - acetylsalicylic is an ester doesn't react F+prepared aspirin You may wish to consult the chapter covering stoichiometry problems in a chemistry text book or do a corresponding websearch for help on completing the following calculations. Also some information is included in the Background section in lab manual for this experiment 8. Calculate the theoretical yield for this reaction. Assume the salicylic acid is the limiting reactant. Also looking at the equation given for this reaction in the Background section in the lab manual for this experiment we see that for every 1 mol of salicylic acid that reacts 1 mol of aspirin should be produced. (molar mass Salicylic acid 138.0 g/mol, molar mass Aspirin = 180.1 g/mol) 9. Calculate youryield. 10, Explain what could cause a less than 100% yield. Part 2 Test for Saicylic Acid 11. Testing for Salicylic Acid, for each substance test indicate the color of the results and the significance of this color Pure aspirin - salicylic acid prepared aspirin - iron IlI chloride 12. Based on the color of your synthesized aspirin how pure was it?

Please help me answer questions #1 through #12. Lab information and results are listed to the right side. Thank you!

Answer 1