What do you think would happen to your recrystallization solution if you did not use a pre- heated filter during the "hot" gravity filtration step?
Q: What would likely happen if a hot saturated solution were filtered by vacuum filtration using a…
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- While recrystallizing, what should you do if you have solid particles that don’t dissolve even after adding a lot more hot solvent than called for in the procedure?1.What is the purpose of washing the recrystallized solid with solvent during the vacuum filtration step? Why should the solvent be cold?What would likely happen if a hot saturated solution were filtered by vacuum filtration using a Hirsch funnel? (Hint: The mixture will cool as it comes in contact with the Hirsch funnel.)
- Why is the final product from recrystallization isolated by vacuum filtration and not by gravity filtration?Occasionally you will have solid impurities “trash” in your heated recrystallization solvent. How do you remove these impurities?Why should the washing solvent be cold in the suction filtration step?
- What should you do if there are insoluble impurities after heating up your sample in the recrystallization solvent? a. Add more solvent to dissolves the impurities. b. Gravity filter the hot solution. c. Pick out the insoluble particles with a spatula. d. none of the above.1. a) While recrystallizing, what should you do if you have solid particles that don’t dissolve even after adding a lot more hot solvent than called for in the procedure? b) What should you do if your crystals don’t come out of solution even after cooling on ice, adding a seed crystal, and scratching for quite a while?How can you remove insoluble impurities during a recrystallization? options: 1-Hot gravity filtration. 2- Vacuum filtration 3- It is not possible.You should choose another separation method. 4- Pick out the impurities with tweezers.
- When isolating a solid compound after recrystallization, which is the appropriate technique to use, vacuum filtration or gravity filtration?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?At what step in the recrystallization process would a colored impurity be removed?