The actual yield is 4.951 What is the percentage yield of the reaction ? cical Manual_Praktika Handleiding_2021.pdf28 / 86136%Part 2: Reflux reaction6. Open the tap and ensure that the Liebig condenser is completely filled with runningwater. The piping and water will be already switched on using the water savingsystem. 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 heatthe solution.8. Boil the mixture under reflux for 30 minutes.9. Extinguish the flame and allow the flask and its contents to cool to roomtemperature.10. Quantitatively transfer the reaction mixture to a 250 cm3 glass beaker.Work-up of product11.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 cooldown the mixture. A white precipitate should form as your final product.26 Part 1: Preparation of reaction mixture1. Add 2 x 20 cm3 of the 20% NaOH solution to the 250 cm3 round-bottom flask. Usea 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 theflask.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 theneck with tap grease.5. Assemble the apparatus for reflux (see figure below).water outletLiebig condenserwater inletclampsreaction flaskretort standblue flamemetal standbunsen burner

Percent yield is the percent amount of product actually formed with reference to that of theoretical…

Answered: The actual yield is 4.951 What is the…

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter80: Crystallization: Purification Of Solids

Section: Chapter Questions

Problem 4P

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The distillation flask is best completely filled with mixture as large as available never less than half empty about 70% full
1,4‐Dimethoxybenzene (0.642 g) was dissolved in 2.0 mL acetic acid in a 25 mL Erlenmeyer flask using heat from a hot plate. Once the solid dissolved, 1.0 mL tert‐ butanol was added, and the reaction mixture was cooled in an ice bath. Then 2.0 mL concentrated sulfuric acid was added in 2‐3 drop portions,stirring the mixture after each aliquot. After the addition, the flask was removed from the ice bath and allowed to sit at room temperature for 15 minutes. Then 1.0 mL water was added dropwise to dilute the acid and the reaction mixture was added to 40 mL cold water in a 100 mL beaker. The solid was vacuum filtered and washed with 5 mL cold water, giving 52 g filtrate. The product wasrecrystallized from 4.5 mL methanol, yielding 0.317 g purified 1,4‐di‐tert‐butyl‐2,5‐dimethoxy benzene (27.2% yield). What is the atom economy, e-factor, and effective mass yield?
for effective purification by recrystalization while avoiding performing a hot gravity filtration, what is the desired solubility of an impurity at different temperatures? Hot solvent solvent after cooling
What are the criteria for a good recrystallization solvent?
MAKE A METHODOLOGY : MATERIALS/ REAGENTS WITH SCHEMATIC DIAGRAM . THE PICTURE UPLOADED SERVES AS A GUIDE, DO THE SAME THING BASED FROM THE PIC. Procedure: Place 20 drops of each of 0.2M CuSO4 in a centrifuge tube. Then add 5 drops of freshly prepared 6M (NH4)2S to each centrifuge tube. Record your observation. Centrifuge the mixtures for 3 mins. and decant the supernatant liquid. Add 10 drops of DI water and 10 drops of 6M HNO3. Stir and boil the mixture in a hot water bath for 5 mins. centrifuge the mixture for 3 mins. Decant the supernatant solution from procedure 3. Discard the To each of the supernatant liquid, add 6 drops of 6M H2SO4. Allow themixtures to cool and 5 drops of DI water. To the mixtures in procedure 4, add few drops of concentrated NH3 until the solution becomes basic. Confirm using a litmus paper. Record your observation. Add 1 drop of 5M NaOH and 1 drop of 0.1 M SnCl2 to the centrifuge tube containing Bi3+ ion , centrifuge and decant the supernatant liquid. To…
How can you tell that a compound is impure? (or pure?) What are the characteristics considered when taking a melting point? What is recrystallization? What is happening on a molecular level (videos are provided) How are solvents chosen for recrystallization? (single solvent or mixed-solvent system).What are the properties of a good solvent system? How are crystals collected?
How are solvents chosen for recrystallization? (single solvent or mixed-solvent system).What are the properties of a good solvent system? How are crystals collected?
1.What is the purpose of washing the recrystallized solid with solvent during the vacuum filtration step? Why should the solvent be cold?
True or False. It is very important to regulate the temperature of the heating mantle so that the distillation occurs at a rate of about 1 drop per 2 seconds. Explain why?
Imagine your original mixture had contained a component capable of sublimation, such as naphthalene. When would be best time to remove this volatile component so the other procedural steps would still work: before step (1), after (1), after (2), or after (3)? Why? How could the volatile component then be collected as a solid?
If you do not heat your crucible strongly enough to remove all volatile impurities when you heat the crucible empty, what will be the result if those impurities are completely volatilized when heating your sample?
Q2. What does “crude” product mean? Q3. What is the advantage of using Buchner filtration in filtering crystals? Q4. Briefly explain how scratching the wall of the glass flask can help formation of crystals. Q5. Briefly explain why crystals form as the solvent cools during recrystallization.

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