Why did we have to use hot ethanol for the recrystallization
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Why did we have to rinse the flask with ethanol and why did it have to be cold ethanol
a) Why do you use a minimum of hot water solvent in carrying out a recrystallization of a particular compound? b) Why is it desirable to use suction filtration rather than gravimetric filtration in recovering the purified crystals? c) Why should the suction be released before the solid is washed with fresh solvent?
why is it important to use a minimum volume of hot solvent to dissolve an impure sample during recrystallization and why is it advisable to cool the solution of a mixture slowly during recrystallization?
Why is it important to use only the minimal amt of hot solventneeded to achieve a recrystallization?What would be the effect of using too much solvent while dissolvinga solid for recrystallization?
A. Recrystallization is an important technique that we used in this lab to purify solids. Answer the following questions related to this technique, which is outlined in the diagram below. (2 pts. each) Watch ass Watch Glass Hot solvent Insoluble mpurities Dissolve the compound Continue heating if necessary hot solvent Fluted fiter paper Continue heating until half of the solvent is evaporated Vacuum filtration Allowed to cool to room temperature then put in an ice bath HOT Gravity filtration 3....
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Recrystallization of Acetanilide Recrystallization is an important method used by chemists to purify solid compounds. When a chemist conducts a chemical reaction as shown in Scheme 1, it will rarely go to 100% completion, and will frequently produce byproducts. These byproducts and some of the unreacted starting materials will be present in the end as impurities. Chemists need ways to remove these unwanted impurities so they can isolate their...
Why do we use ethanol, and not water to remove the OpaDry coating from pills?
1. How did the melting point of your acetanilide change after recrystallization? 2. Why would you test the purity of your acetanilide by mixing it with a known, pure sample of acetanilide and rechecking the m.p.?
Once a solvent for recrystallization is chosen, why is it important to use the minimum amount possible?
If crystals don’t form after the recrystallization flask is cooled in an ice bath, there is nothing more to do to gain crystals. True False Question 2 What is the recrystallization solvent for triphenylmethanol? hexanes ethanol a hexanes/ethanol mixture water Question 3 What is the theoretical yield of the product, triphenylmethanol, if 20.0 mmol of benzophenone is the limiting reagent? 3.140 g 3.644 g 5.207 g 20.0 g Question 9 When recrystallizing a solid: hot solvent should be used the...