FUCKING orgo lab numero uno

FUCKING orgo lab numero uno - Laboratory Techniques:...

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Laboratory Techniques: Recrystallization, Distillation, and Extraction Dates: 9/15/09 and 9/22/09 Staci Williams Tuesday 6:10-10:40
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Introduction/Purpose: The purpose of this lab is to practice and perfect basic laboratory techniques such as recrystallization, distillation, and extraction that will be continuously used throughout our labs this semester, along with becoming familiar with the laboratory equipment. Summary of Procedure: Dissolve and recrystallize acetanilide to rid it of impurities, and then measure the melting point. Also extract naphthalene from a mixture with benzoic acid, and measure the melting point. Neutralize the aqueous extract and recrystallize, and then measure the melting point. Lastly perform a simple distillation of cyclohexane by heating until vapor rises halfway up, and then record the temperature. Outline of Experiment: Recrystallization: 1. Add 100mg of impure acetanilide and 1mL water to small test tube and heat test tube by adding 2cm sand to a 50mL beaker, then place on hot plate 2. Hold test tube with test tube holder or 3 pronged clamp while heating, taking about 4mL of water to dissolve acetanilide completely, add at equal rate due to water loss while heating, leaving the test tube half full when acetanilide is dissolved 3. No decolorizing carbon needed, and if impurities present decant liquid into another small test tube and allow for test tube to cool until crystals seen 4. Cool the test tube in an ice water bath to induce further crystallization and then filter using vacuum filtration with Hirsch funnel and small filtering flask
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FUCKING orgo lab numero uno - Laboratory Techniques:...

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