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Fermentation and Distillation

Fermentation and Distillation. General Chemistry 101/102 Laboratory Manual University of North Carolina at Wilmington. Fermentation and Distillation. Purpose. To demonstrate the production of ethanol by the process of fermentation.

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Fermentation and Distillation

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  1. Fermentation and Distillation General Chemistry 101/102Laboratory ManualUniversity of North Carolina at Wilmington

  2. Fermentation and Distillation • Purpose • To demonstrate the production of ethanol by the process of fermentation. • Use the technique of distillation to separate a homogeneous mixture into its individual components. • Safety Considerations • Do not drink the alcohol you produce in this experiment! • Discard the Ca(OH)2 and paraffin oil in the labeled bottle in the hood. Flush all other materials down the drain with plenty of water.

  3. make sure end of tube is below paraffin oil • Setup the apparatus as shown in the photo. Fermentation and Distillation • Procedure • Place sugar, Pasteur salts, and deionized water into a 250 mL flask and swirl. Add yeast and swirl again. • Fill a medium test tube 1/3-full with Ca(OH)2 and add 5 drops of paraffin oil.

  4. Setup the distillation apparatus as shown in the photo below. glass tubing should end here Fermentation and Distillation • Procedure • Decant the fermentation mixture into a clean 250 mL flask. • Gently boil the solution while collecting the distillate in the test tube. Collect about 6 mL of distillate.

  5. Use about 4 mL of your alcohol to determine its density. Use the graph of Proof vs. Density to determine its proof. • Place 10 drops of your alcohol in a watch glass and attempt to ignite it with your Bunsen burner. If it burns on its own, it is at least 40 proof. Fermentation and Distillation • Procedure

  6. Using the class data, construct a graph of mass vs. volume for all the bourbon samples. Draw a “best fit” straight line through your data. Fermentation and Distillation • Procedure • Each group will determine the mass of an assigned volume of bourbon. Record the mass and volume of your bourbon sample on the board.

  7. Determine the slope of your “best fit” straight line. This is the density of the bourbon. Determine its proof from the Proof vs. Density graph. slope = slope = DY mass2 – mass1 DX DY vol2 – vol1 DX Fermentation and Distillation • Procedure

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