distillation

distillation - compounds that would allow effective...

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E XPE RI M E N T : S I M P L E D IST I L L A T I O N A N D G AS C H R O M A T O G R A P H Y Name _______________________________________ Instructor ____________________________________ Chem ____________ Section/Color ______________ Date ________________________________________ Laboratory Questions 2007a These questions are to be completed and turned in at the beginning of the pre-lab period. PR E-L A B Q U EST I O NS 1. In terms of physical properties, what is required for a compound to be readily distilled with the equipment available in this laboratory? 2. The simple distillation setup used in this experiment provides about one theoretical plate. Use the data in Table 1 of the Distillation Techniques chapter to e st ima t the minimum boiling point difference between two
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Unformatted text preview: compounds that would allow effective separation (98% purity) of the two compounds by simple distillation. 3. What would be the effect on the temperatures observed during distillation if the thermocouple was placed at the top of distillation head bulb rather than near top of the column portion of the distillation head? It must have a boiling point 25 C higher than the temperature of the water in the condenser, but not more than 120 C higher than coolant. It must not decompose at high temperatures (at its boiling point). 45-50 C is the best answer, but anything between 40-100 C gets full credit. Above 100 C gets 1/2. The thermocouple would read a much lower temperature. 3 pts 1 pt 1 pt...
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This note was uploaded on 07/17/2011 for the course CHEM 237 taught by Professor Yu-chinli during the Spring '07 term at Texas A&M.

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