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The number of moles of NaOH used is 0.5 and number of moles of methyl salicylate is 0.023 . What is the limiting reagent and please calculate the theoretical yield of the salicylic acid product in grams

The number of moles of NaOH used is 0.5 and number of moles of methyl salicylate is 0.023 . What is the limiting reagent and please calculate the theoretical yield of the salicylic acid product in grams

Macroscale and Microscale Organic Experiments
Macroscale and Microscale Organic Experiments
7th Edition
ISBN:9781305577190
Author:Kenneth L. Williamson, Katherine M. Masters
Publisher:Kenneth L. Williamson, Katherine M. Masters
Chapter6: Steam Distillation, Vacuum Distillation, And Sublimation
Section: Chapter Questions
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The number of moles of NaOH used is 0.5 and number of moles of methyl salicylate is 0.023 . What is the limiting reagent and please calculate the theoretical yield of the salicylic acid product in grams
Part 1: Preparation of reaction mixture 1. Add 2 x 20 cm3 of the 20% NaOH solution to the 250 cm3 round-bottom flask. Use a funnel to prevent the neck of the flask from getting wet. 2. Use another clean funnel to add 3 cm3 of methyl salicylate to the solution in the flask. 3. Add a pinch of boiling chips to the mixture. 4. Make sure that the neck of the flask is clean and dry before lightly greasing the neck with tap grease. 5. Assemble the apparatus for reflux (see figure below). water outlet Liebig condenser water inlet clamps reaction flask retort stand blue flame metal stand bunsen burner
Transcribed Image Text:Part 1: Preparation of reaction mixture 1. Add 2 x 20 cm3 of the 20% NaOH solution to the 250 cm3 round-bottom flask. Use a funnel to prevent the neck of the flask from getting wet. 2. Use another clean funnel to add 3 cm3 of methyl salicylate to the solution in the flask. 3. Add a pinch of boiling chips to the mixture. 4. Make sure that the neck of the flask is clean and dry before lightly greasing the neck with tap grease. 5. Assemble the apparatus for reflux (see figure below). water outlet Liebig condenser water inlet clamps reaction flask retort stand blue flame metal stand bunsen burner
cical Manual_Praktika Handleiding_2021.pdf 28 / 86 136% Part 2: Reflux reaction 6. Open the tap and ensure that the Liebig condenser is completely filled with running water. The piping and water will be already switched on using the water saving system. Ensure that the pipes are handled with care as water can easily leak out. 7. Light the Bunsen burner and place it + 2 cm below the round-bottom flask to heat the solution. 8. Boil the mixture under reflux for 30 minutes. 9. Extinguish the flame and allow the flask and its contents to cool to room temperature. 10. Quantitatively transfer the reaction mixture to a 250 cm3 glass beaker. Work-up of product 11.Acidify the reaction mixture by adding 3 M H2SO4 (approximately +5 cm3 at a time). Use Congo red paper to determine when the mixture is acidic. 12.After confirming that the reaction mixture is acidic add a further 15 cm3 of H2S04. 13.Place the beaker in an ice bath (a larger beaker containing ice and water) to cool down the mixture. A white precipitate should form as your final product. 26
Transcribed Image Text:cical Manual_Praktika Handleiding_2021.pdf 28 / 86 136% Part 2: Reflux reaction 6. Open the tap and ensure that the Liebig condenser is completely filled with running water. The piping and water will be already switched on using the water saving system. Ensure that the pipes are handled with care as water can easily leak out. 7. Light the Bunsen burner and place it + 2 cm below the round-bottom flask to heat the solution. 8. Boil the mixture under reflux for 30 minutes. 9. Extinguish the flame and allow the flask and its contents to cool to room temperature. 10. Quantitatively transfer the reaction mixture to a 250 cm3 glass beaker. Work-up of product 11.Acidify the reaction mixture by adding 3 M H2SO4 (approximately +5 cm3 at a time). Use Congo red paper to determine when the mixture is acidic. 12.After confirming that the reaction mixture is acidic add a further 15 cm3 of H2S04. 13.Place the beaker in an ice bath (a larger beaker containing ice and water) to cool down the mixture. A white precipitate should form as your final product. 26
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