Exp 4 Lab Report Form.doc - CH223 Organic Chemistry Lab I – Fall 2019 Experiment#4 – Recrystallization of Acetanilide Report Form Solubility Data

Exp 4 Lab Report Form.doc - CH223 Organic Chemistry Lab I...

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CH223: Organic Chemistry Lab I – Fall 2019 Experiment #4 – Recrystallization of Acetanilide Report Form Solubility Data Table Ethanol Acetone Methanol RT Hot Cold RT Hot Cold RT Hot Cold Acetanilide S - - S - - S - - Water RT Hot Cold Acetanilide I S I What is the best recrystallization solvent? Why? How many mL of that solvent should you start with to recrystallize 5 g of acetanilide? The best recrystallization solvent was the water, for the simple fact that it was the only solvent that the acetanilide did not dissolve in at room temperature. The process was still carried out just in case, and the acetanilide did in fact recrystallize when returning to a cooled temperature. Using this knowledge, it was determined that 50 mL of solvent should be used to start with to recrystallize the 5 g of acetanilide. This is because the acetanilide will be dissolved in the water at an elevated temperature, and at an elevated temperature, acetanilide takes 20 mL/g of water. Multiply that by five (for the 5 g) and then divide by two (50% of) to start with and that results in 50 g of water.
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