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18 Nov 2019
Answer the post lab questions for crystallization experiment.
POST-LABORATORY QUESTIONS . A vast majority of crystallization procedures call for the use of methanol or ethanol as the ngystaization solvent. Why are these preferred over larger alcolols such as 2-butanol (which A sample of aspirin is contaminated with table salt and sand. Aspirin can be recrystallized from water. In which steps are the salt and sand removed? 3. The table below provides the solubilities of compounds A and B in ethanol. 00 mlLcoint At the Solubil 0.1 0.9 A. 1.3 You are purifying 10 g of compound A contaminated with 1 g of compound B. a. Calculate the minimum volume of ethanol that you would need to crystallize the sample. b. Calculate the % Recovery of A upon crystallization, disregarding experimental losses. c. Is A pure after crystallization? Is A pure after crystallization if A (10 g) is contaminated with 1.5 g of B? What is the % ofA in the crystallized product? d. 41
Answer the post lab questions for crystallization experiment.
POST-LABORATORY QUESTIONS . A vast majority of crystallization procedures call for the use of methanol or ethanol as the ngystaization solvent. Why are these preferred over larger alcolols such as 2-butanol (which A sample of aspirin is contaminated with table salt and sand. Aspirin can be recrystallized from water. In which steps are the salt and sand removed? 3. The table below provides the solubilities of compounds A and B in ethanol. 00 mlLcoint At the Solubil 0.1 0.9 A. 1.3 You are purifying 10 g of compound A contaminated with 1 g of compound B. a. Calculate the minimum volume of ethanol that you would need to crystallize the sample. b. Calculate the % Recovery of A upon crystallization, disregarding experimental losses. c. Is A pure after crystallization? Is A pure after crystallization if A (10 g) is contaminated with 1.5 g of B? What is the % ofA in the crystallized product? d. 41
Elin HesselLv2
16 Jul 2019