ORGANIC CHEMISTRY 2 I just want someone to verify my work. I worked on it but I\
ID: 1074244 • Letter: O
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ORGANIC CHEMISTRY 2
I just want someone to verify my work. I worked on it but I'm not too sure if I did it right. If I didin't, can you show me how to do it.
Question: The refractive indeces of water and ethanol will be provided, along with the formula for correcting the measured index and calculating the mole fraction of ethanol. Use these to calculate the mole fraction of ethanol in your distillate.
Given: RI of water: 1.3330 ... RI of ethanol: 1.3616
At the beginning, we used 12% Ethanol, my RI was 1.3591 at 18.8C.
Done Photo (2 of 2) De fractomer re fracve index . n Sine I 3qMy distiled Sototion Rl of H20 1.3330 pI of Ethan: (.3blb formota: (T-200 0.00045) 1.3535-Est, mate fl e T2 mole fracton, 11956 s-'M.4 1/3/18 Organic Chem LabExplanation / Answer
temperature correction for the mixture to get nD at 200C
nD20 = nT + (T-20.0)(0.00045) = 1.3591 + (18.8-20.0) (0.00045) = 1.3591-0.0005 = 1.3586
nmix =1.3586 nA = 1.3330 nB = 1.3616
mole fraction of ethanol XB =(nmix - nA) / (nB - nA) = (1.3586- 1.3330) / (1.3616- 1.3330) = 0.0256/0.0286 = 0.8951
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