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18 Nov 2019
1. List the basic steps in the recrystallization of acetanilide. Include the identity of the solvent that will be used and what is added before hot filtration (see the "general steps" and/or the paragraph headings in the procedure) 2. List the types of bonds in acetanilide (ex. C-C) and whether each is considered polar or non-polar. Use this information to explain why water is a good recrystallization solvent for acetanilide 3. After hot filtration removes insoluble impurities, the remaining solution is cooled in an ice bath without being disturbed. Explain what happens during the crystallization process and what happens if crystals form too quickly Why should a minimum amount of hot solvent be used for dissolving the crude solid? Why must the recrystallized solid be washed with cold solvent? 4. 5. What effects do most impurities have on the melting point of organic compounds? 6. The solubility of acetanilide in hot water is 5.5 g/100 mL at 100 °C and its solubility in cold water is 0.53 g/100 mL at 0 °C. What is theoretical percent recovery from this recrystallization experiment, assuming you will use exactly 2.00 g of crude acetanilide and 35.0 mL of water (hint: see equations 1 and 2)? Show your work (typed or in pen)
1. List the basic steps in the recrystallization of acetanilide. Include the identity of the solvent that will be used and what is added before hot filtration (see the "general steps" and/or the paragraph headings in the procedure) 2. List the types of bonds in acetanilide (ex. C-C) and whether each is considered polar or non-polar. Use this information to explain why water is a good recrystallization solvent for acetanilide 3. After hot filtration removes insoluble impurities, the remaining solution is cooled in an ice bath without being disturbed. Explain what happens during the crystallization process and what happens if crystals form too quickly Why should a minimum amount of hot solvent be used for dissolving the crude solid? Why must the recrystallized solid be washed with cold solvent? 4. 5. What effects do most impurities have on the melting point of organic compounds? 6. The solubility of acetanilide in hot water is 5.5 g/100 mL at 100 °C and its solubility in cold water is 0.53 g/100 mL at 0 °C. What is theoretical percent recovery from this recrystallization experiment, assuming you will use exactly 2.00 g of crude acetanilide and 35.0 mL of water (hint: see equations 1 and 2)? Show your work (typed or in pen)
Casey DurganLv2
5 Oct 2019