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Extraction of alcohol from beer by distillation.

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Introduction

´╗┐Dr. Sharma Chemistry Unit 22 EXTRACTION OF ALCOHOL FROM BEER AIM The objective of this practical is to extract alcohol (pure) from (Tennenent?s Super Strong Lager) beer. APPARATUS & CHEMICALS 1. Thermometer 2. Measuring Cylinder 3. Spatula 4. Anti-bumping Granules 5. Boiler (Round Bottom Flask) 6. Fractional Distillation Flask 7. Matches 8. Flameless Heater 9. Condenser 10. Bucket With Ice 11. Moveable Platform 12. Watchglass 13. Pipette 14. Tennenent?s Super Strong Lager (Beer) METHOD & OBSERVATIONS 1. Health & Safety precautions were taken; this includes wearing lab coats and goggles in order to avoid harm to one?s body or surroundings. 2. The apparatus was set up to carry out the experiment. ...read more.

Middle

7. The liquid pours down into the round bottom flask inside a bucket with ice, to maintain its liquid state. 8. The thermometer was constantly observed, this is because the boiling point of the beer is 78°C and the boiling point of water is 100°C, therefore we must make sure we do not exceed the temperature over the beer’s boiling point, as our desired product is only the alcohol. 9. When the water molecules vaporised and began to pass the distillation flask, it quickly condensed and poured back down into the boiler. 10. After some time, the boiling had stopped; this is a sign that there is no more alcohol left (because alcohol expands and causes the bubbles), and so the power of the heater was turned off. ...read more.

Conclusion

4. An alternative way of confirming the test for alcohol is by recognising the scent of alcohol. LABELLED DIAGRAM RESULTS Calculations on beer experiment: 1. Volume of beer (Tennenent?s Super Strong Lager) = 25Ocm3 2. Percentage of alcohol by volume/volume=9% 3. Theoretical yield or maximum yield =(9/100)x beer volume = (250) = 9/100 x 250 = 22.5cm3 1. Volume of alcohol collected by distillation of beer = 16cm3 2. Percentage yield of alcohol from beer = (actual yield/theoretical yield) x 100 = 22.5/16 x 100 = 71.1% CONCLUSION In conclusion, pure alcohol was successfully produced by the fractional distillation method; however we were not able to collect the full theoretical yield due to the error factors. ________________ | Page Stephanie Da Silva ...read more.

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