ent DISTILLATION: SEPARATION AND PURIFICATION OF ORGANIC LIQUIDS Data and Questi

Question

ent DISTILLATION: SEPARATION AND PURIFICATION OF ORGANIC LIQUIDS Data and Questions Copy this BLANK sheet In your lab notebook before coming to lab. By itself, this is not a satisfactory laboratory report Name of liquid allone Observations: ation of e Liquid Quantily (m Observations: ation of Quantity, mL 1 3 5 79 11 13 1517 19 Names of students compared models with: Angelo Rache st-lab tions Plot the boiling point against the volume of distillate for the distillation of the acetone/n-propanol mixture. For reference, also plot the pure liquid (acetone or n-propanol) that you distilled first. Be sure to number your y-axis and identify each line on the plot using different colors or symbols. Indicate the approximate boiling point of acetone and of n-propanol on your plot. Use the evidence from the plot in question 1 to determine liquid has a lower boiling point, n-propanol or acetone. Does this match your pre-lab prediction? 1. 2

Explanation / Answer

Separation of organic liquids by distillation

Experiment is done with a sample volume of mixed liquid. The system is heated. When the temperaure reaches to the boiling point of first component in the mixture, it starts to vaporize and condense. The total volume collected at this temperature is calculated. Now raise the temperature further to reach to boiling point of second liquid. The liquid starts to vaporize and then condense. Again calculate total volume collected.

Plot,

x-axis : Quantity (ml) of liquid colleected. [1-19 ml]

y-axis : Temperature

This should show almost two plateau for the two liquid boiling points.

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