experiment 2

experiment 2 - experiment 2: separation of water and...

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experiment 2: separation of water and ethanol e(simple and fractional distillation) the purpose of this experiment is to become more familiar with the technique of simple and fractional distillation to purify compounds. this experiment will also demonstrate the effects of liquid and vapor pressure on boiling point. the differences between fractional and simple distillation will then be compared to evaluate the efficiency of each. reagents mol. wt. density chem form. melt p. boil p. ethanol 46.04, .790, c2h5oh, -114.1, 78* water 18, 1, h20, 0*, 100* procedure: -assemble apparatus -add 15ml of 20% alcohol water solution -add 2-3 boiling stones and put 10ml graduated cylinder at the end of the
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condenser -begin heating -record temperature for every .5ml in the graduated cylinder and continue until 6ml has distilled or the temperature reaches 100*c -stop: turn off heat and raise clamp -repeat with fresh solution and the fractionating column in lab: -set up apparatus for both the simple and fractional, put 15ml 20% alcohol water in flask simple/fractional 1st drop 77/70 .5ml 78/72 1ml 79/74 1.5ml 80//75 2 81/79 2.5 82.5/81 3 84.5/84
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3.5 90/88
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This note was uploaded on 08/14/2010 for the course BIO 2010 taught by Professor Le during the Summer '10 term at UCSB.

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experiment 2 - experiment 2: separation of water and...

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