boiling point of mixtures of ethanol and water
DESCRIPTION
Boiling Point of Mixtures of Ethanol and Water. Group 18: Sanya Dhoundiyal, Jessica Chung and Erik Wolter. Ethanol. What is the relationship of increasing the proportion of water to ethanol on the boiling point of the resulting mixture?. Application. - PowerPoint PPT PresentationTRANSCRIPT
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Boiling Point of Mixtures of Ethanol and Water
Group 18: Sanya Dhoundiyal, Jessica Chung and Erik Wolter
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Ethanol
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What is the relationship of increasing the
proportion of water to ethanol on the boiling point of the resulting mixture?
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Application
• Production of moonshine (distillation)• Safety when using alcohol in cooking
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VariablesType of Variable
Ratio of moles of water to ethanol
Independent
Boiling Point Dependent
Pressure Control
Volume of the mixture Control
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Independent VariableRatio of moles of water to moles of ethanol
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Dependent VariableBoiling point of mixture (°C)
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Controlled Variables• Pressure• Volume of ethanol and water• Uneven boiling
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Materials
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Procedure
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Setting Up the Three Way Flask and Reflux Condenser
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Results
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Qualitative Data
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Molar Ratios
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Data Analysis
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Conclusion
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Evaluation
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Heating
• Heating from pot uneven• Heating of mixture in three way flask
unevenSolution• Electric heater(school does not have one)
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Impurities in Ethanol
• Not “pure• Impurities existed
in the Ethanol• Assumed that 5%
remaining in Ethanol was water
Solution• 99.6% ethanol
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Density
• Densities were assumed to be that at STPSolution• Weigh the mass of added volumes
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Uneven Boiling
• Whether the mixture is or is not homogenous
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Works Cited• "Elmo33: Measuring Volume." Elmo33: Measuring Volume. Web. 30 May 2012.
<http://elmo33-elmo3.blogspot.com/2011/12/measuring-volume.html>.• "Graduated Cylinder - PP, Blue Printed Graduations." : Globe Scientific Inc.: Laboratory
Plasticware, Laboratory Glassware and Laboratory Equipment Specialists. Web. 30 May 2012. <http://www.globescientific.com/graduated-cylinder-pp-blue-printed-graduations-p-2419.html>.
• "Laboratory Retort Stand Kit." Laboratory Retort Stand Kit. Web. 30 May 2012. <http://www.rapidonline.com/Education/Laboratory-Retort-Stand-Kit-66646>.
• "Pipette Products, Buy Pipette Products from Alibaba.com." Alibaba. Web. 30 May 2012.
<http://www.alibaba.com/product-gs/51220572/Pipette.html>.• "Liebig." --- SciLabware. Web. 30 May 2012. <http://www.scilabware.com/Condensers/Liebig/p-29-150/>.• "A Problem Has Occurred." Spectrum Scientifics. Web. 31 May 2012. <http://www.spectrum-scientifics.com/cgi-bin/commerce.cgi?preadd=action>.• "Electric Hot Plate,Electric Stove - Suppliers, Manufacturers, Vendors, Factory, Importers,
Exporters." Electric Hot Plate,Electric Stove - Suppliers, Manufacturers, Vendors, Factory, Importers, Exporters. Web. 31 May 2012. <http://www.bridgat.com/electric_hot_plate_electric_stove-o204735.html>.