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Chemistry, 10.10.2019 04:10 elreemali03
When you measured out one ml of the trans-1,2-dibenzoylethylene in ethyl acetate solution it had a mass of 0.890 grams. (0.050 g of yellow solidand rest of it is ethyl acetate). the forerun of ethyl acetate had a mass of 0.075g and the rest of the ethyl acetate collected had a mass of 0.253 g. the trans-1,2-dibenzoylethylene had a mass of 0.046 g. what is the percent recovery of each of the materials?
if the ethyl acetate collected in the forerun had a refractive index of 1.3715 at 24.5 c, what is the corrected value for 20 c?
3. i. the ir spectrum of trans-1,2-dibenzoylethylene has a strong peak near 1680 cm-1. to what stretching frequency could this peak correspond?
ii. similarly, ethyl acetate shows a strong signal at 1730 cm-1. to what stretching frequency could this peak correspond?
iii. explain why the c=o signal in trans-1,2-dibenzoylethylene appears at lower frequency than that
of ethyl acetate.
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When you measured out one ml of the trans-1,2-dibenzoylethylene in ethyl acetate solution it had a m...
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