a)
Interpretation:Use of filter flask during recrystallization at miniscale level should be determined.
Concept introduction:Recrystallization is technique that is used for purification of organic compounds. This process includes dissolution of solid in specific solvent at high temperature and then crystals are made again by process of cooling. Temperature of crystals is decreased to allow impurities to remain in solution only.
b)
Interpretation: Use of filter trap during recrystallization at miniscale level should be determined.
Concept introduction: Recrystallization is technique that is used for purification of organic compounds. This process includes dissolution of solid in specific solvent at high temperature and then crystals are made again by process of cooling. Temperature of crystals is decreased to allow impurities to remain in solution only.
c)
Interpretation: Use of Buchner funnel during recrystallization at miniscale level should be determined.
Concept introduction: Recrystallization is technique that is used for purification of organic compounds. This process includes dissolution of solid in specific solvent at high temperature and then crystals are made again by process of cooling. Temperature of crystals is decreased to allow impurities to remain in solution only.
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Experimental Organic Chemistry: A Miniscale & Microscale Approach (Cengage Learning Laboratory Series for Organic Chemistry)
- One of the problems that can be encountered in recrystallization is the failure of the solute to crystallize. In which of the following scenarios could that happen? a. Cooling the filtrate in an ice bath. b. Using a wide bore, long-stemmed funnel in the hot filtration step. c. Addition of too much water in the receiving flask. d. Washing the residue with cold solventarrow_forwardWhich is not required in recrystallization? a. solution is filtered at high temperature b. moderate volatility solvent c. saturated solution d. solvent must dissolve the impuritiesarrow_forwardVolumetric pipettes are designed to deliver a precise amount of liquid, but only if you a. submerge the end of the pipette into a solution you are delivering. b. allow the pipette to drain freely, and leave any residual solution in the pipette. c. hold the pipette at a 45 degree angle and ensure that all the liquid is delivered.arrow_forward
- 3. What is particulate gravimetry? When do we use this technique? 4. What are the conditions for a successful gravimetric analysis. 5. Define nucleation. What conditions are important for this stage.arrow_forwarda. What are the qualities of a perfect solvent for recrystallization? b. How much solvent must be used in the recrystallization and why?arrow_forwardWhat are the criteria for a good recrystallization solvent?arrow_forward
- 1. Discuss the appearance and use of each pipette. a. Ostwald folin pipette b. Volumetric pipette c. Mohr pipettearrow_forwardMultiple choice. Please check my answers from 5-9 if they are correct. Thanks!arrow_forwardIndicate which of the two filtration techniques, gravity or vacuum, is the suitable for each of the following operations. a. Hot filtration B. Removal of decolorising carbon C. Isolation of recrystallized solute from solution 2. What is the process of seedling as it applies to recrystallisation? What purpose does it serve?arrow_forward
- Briefly explain why crystals form as the solvent cools during recrystallization.arrow_forwardWhat is brewing tea in water an example of? A. solid-liquid extraction B. liquid-liquid extraction C. none of the above D. recrystallization E. all of the abovearrow_forwardFilter paper Saturated KNO; solution 259 Figure 1. Experimental apparatus. Experimental Procedure Part 1. Copper and Zinc Metal 1) Select a piece of copper and a piece of zinc metal wire from the containers in the hood. 2) Clean the surface of the metal wires with the steel wool. Wipe clean with a dry paper towel. 3) Obtain a plastic well plate. Fill one well with 10 drops of the Copper ion solution from the dropper bottle. Label this well with a Sharpie marker so that you remember which solution you filled it with, 4) Repeat step 3 with Zinc ion solution. Select a well right next to the well in step 3 so that the two wells with Copper and Zinc ion solution are right next to each other. 5) Obtain a small dry strip of filter paper. You may have to cut a large piece of filter paper down to the appropriate size. It should be exactly this big C It's OK to tear the filter paper with your hands. Using the drop bottle, saturate the filter paper strip with KNO; solution. Gently place one end…arrow_forward
- Macroscale and Microscale Organic ExperimentsChemistryISBN:9781305577190Author:Kenneth L. Williamson, Katherine M. MastersPublisher:Brooks ColeChemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningEBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT