s. Why is suction filtration preferred over gravity filtration? 6. After recryst
ID: 1026069 • Letter: S
Question
s. Why is suction filtration preferred over gravity filtration? 6. After recrystallization, a student calculated the yield to be 50%. Give two specific reasons why the yield is low (think about the procedure). 7. Activated charcoal was added to your saturated sample that was crystallized. purpose of adding the charcoal? What was the 8. What is refluxing and why is it an important technique used in organic chemistry? 9. What is the difference between simple and fraction distillation? 10. Give a difference between capillary melting point (organic chemists) and melting point (physical chemists)Explanation / Answer
5. Suction filtration preferred over gravity filtration because the flow rate of filtrate will more in case of suction filtration in comparison with the gravity filtration. Due to more flow rate of filtrate the duration of filtration will reduce many folds in comparison to gravity filtration which is a very time taking process. To reduce the time duration and getting little more drying of the sample Suction filtration preferred over gravity filtration.
6. During the process of recrystallization of any compound, the yield used to reduce because during this process only pure product use to give the crystal and remaining stuff whatever is present in the sample will dissociate and decompose. During the recrystallization, the initially the most stable species will grow the nucleation of crystal later all similar kind of material adhered to it and results in the form of the crystal. all the impure species will decompose in mother liquor because of this the yield will reduce in most of the cases.
7. The purpose of adding the activated charcoal in the sample is to decolorize the solution because activated is a well-known adsorbent which is used as a decolorizing agent in many known processes.
8. Reflux is a process of the vaporization and condensation simultaneously of any solvent using the condenser with reflux setup. during the reflux solvent used to evaporate and it uses to cool down again its original state by the circulated water in the condenser. It is a very useful process with is used for the distillation of the organic solvents for further use in anything of solvent. To get the pure product is always desired for all chemists so for this it is a nessacaryr condition to use everytime distilled solvent. therefore, refluxing is a very important technique for organic chemists.
9. Simple distillation is used for the single solvent system it is not a that much dependent on the boiling point while fractional distillation acquires specific setup and well knowledge of boiling point and it is used for distilling mixture of solvents.
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