1. Perform the basic steps in the recrystallization the acetanilide. Encompass the identification of the solvent that will be used and also what is included before warm filtration (see the "general steps" and/or the paragraph headings in the procedure) 2. Perform the species of bond in acetanilide (ex. C-C) and also whether each is taken into consideration polar or non-polar. Usage this information to explain why water is a an excellent recrystallization solvent because that acetanilide 3. After warm filtration removes insoluble impurities, the remaining solution is cooled in an ice bath without gift disturbed. Explain what happens throughout the crystallization process and what wake up if crystals kind too conveniently Why should a minimum amount of warm solvent be offered for dissolve the crude solid? Why must the recrystallized solid be washed v cold solvent? 4. 5. What impacts do most impurities have on the melting allude of essential compounds? 6. The solubility the acetanilide in warm water is 5.5 g/100 mL at 100 °C and its solubility in cold water is 0.53 g/100 mL in ~ 0 °C. What is theoretical percent restore from this recrystallization experiment, suspect you will use specifically 2.00 g of crude acetanilide and also 35.0 mL that water (hint: check out equations 1 and also 2)? present your job-related (typed or in pen)

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Melting point of the product was ranged indigenous 97-102*C what is the major product formed?


Part C: Miniscale Nitration of an Unknown aromatic Compound Prepare one ice-salt bath in a 100- or 150-mL maker on a magnetic row plate. The tem- perature that the ice-salt bath must be-8°C location 1 g the the aromatic compound in a 25-mL Erlenmeyer flask and add 2.25 mL of focused (18 M) sulfuric acid and a line bar. Very closely place the flask in the icebath so it stays immersed and begin stirring. Pre- pare the nitrating solution by including 0.75 mL of concentrated (18 M) sulfuric acid and also 0.75 mL of concentrated (16 M) nitric acid to a clean, dry vial. Cool this mixture in the ice cream bath. Through a Pasteur pipet, slowly include the cooled nitrating equipment to the stirring solution containing the fragrant compound. The addition should take about 15 minutes. Including the nitrating agent much more rapidly will boost the amount of by-products and also decrease the yield. After every the nitrating agent has actually been added, carefully remove the icebath. Proceed stirring until the reaction has pertained to room temperature. Then let the reaction flask was standing undisturbed because that 15 minutes. Place 10 g of ice cream in a 50-mL beaker. Through a Pasteur pipet, carefully transfer the reaction mixture to the beaker containing the ice. Rinse the flask with 5 mL the cold water. When the ice has actually melted, vacuum filter the rudely crystals utilizing a Büchner funnel. Wash the crystals with two 5-mL sections of cold water. Recrystallize the product. To choose the recrystallization solvent, test tiny amounts that the crude product in methanol, 2-propanol, or other solvents. Alternatively, the instruc- tor may suggest an suitable recrystallization solvent for the specific unknown. Permit the crystals dry thoroughly before measuring the melt point. Document the massive of the dried product and also calculate the percent yield. Determine the identification of the product based upon the melting point. Melt points the the feasible products are in-depth in Table 12.2-1

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Each the the adhering to procedural errors is most likely to reason either the trouble of short yield that crystals, the trouble of low purity that crystals, or both. Which among these problems would it is in most most likely to take place for each error listed. Define why. (a) Too lot solvent was added when the sample was dissolved. (b) Too little solvent was included when the sample was dissolved and also the systems was permitted to crystallize there is no filtering. (c) The warm solution to be cooled easily in ice water come hasten crystallization, fairly than being enabled to cool gradually to room temperature before placing in ice. (d) The washing of crystals top top the Buchner funnel to be done through room-temperature solvent fairly than with ice-cold solvent. Assuming that the compound isolated through crystallization indigenous water in this experiment will certainly be among the simulated Bromoseltzer components, predict, as ideal as friend can, which component it will certainly be. You need not be positive about your price - that"s what experiments room for. Indicate the factors connected in her decision and also how you landed on your prediction (you will require to have the Table that Reagents ar in your lab notebook complete to perform this). Use the earlier of this document if you operation out the room.