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Lab Report Simple Distillation SEP 22 2011.docx

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University of British Columbia
CHEM 203

Simple Distillation September 16 2011 PURPOSE Distillation was used as a separation process to purify a liquid mixture with unknown boiling 1point This technique of separation was first performed at the laboratory atmospheric pressure then subsequently at a reduced pressure A nomograph was used to produce an 2estimate value of the unknown reduced pressure to study the relationship between temperature and vapor pressure atmospheric or applied PROCEDURES Refer to p 24 of the CHEM 23202420 of the Laboratory Manual Fall 2011 Edition for the procedures of this experimentA magnetic stirrer was used in lieu of a boiling stoneFor simple distillation at atmospheric pressure head temperature C was recorded for approximately every 025 mL of distillate collected instead of every 30 seconds of the distillation process Distillation at reduced pressure was carried out by Jade Anderson and her lab partner and data were obtained for the class HAZARDSGlycerol CHO approximately 1 mL was used to facilitate good heat transfer from the heat 3833block Contact with skin should be kept at a minimal to prevent skin dehydration OBSERVATIONS The liquid to be distilled was light yellow in color with a low viscosity The end product condensate collected was a colorless liquid with similar degree of viscosity During simple distillation at atmospheric pressure of 7631 mmHg lab temperature of 24C droplets of vapour were collected on the distilling flask wall after heating the distilling liquid for approximately 15 minutes Boiling began at 90 to 92C approximately 22 minutes into the experiment Boiling range of the liquid was noted At 22 minutes vapour was collected on the thermometer bulb at 92C At 40 minutes the head temperature dropped to 76C then rose to 98C at 50 minutes Droplet of the distillate began to collect in the receiving flask at 101C 505 minutes into the experiment Approximately 15 mL of distillate was collected into the receiving flask at 102C 105 minutes after the initial droplet of distillate was received and the distillation process was terminated by the experimenters Cheryl Lee 100191898 Lab PartnersThomas Kwok Jade Anderson Page 1 of 6
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