11/14/201604:55 PM 8956/100 11I3/2016 11:57 AM Print calculator Periodic Table Q

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11/14/201604:55 PM 8956/100 11I3/2016 11:57 AM Print calculator Periodic Table Question 19 of 29 Saping Learning An attempt at synthesizing a certain optically active compound resulted in a mixture of its enantiomers The mixture had an observed specific ratation of +15.2. lfitis known that the specific rotation of the R enantiomer is -35.6", determine the percentage of each isomer in the mixture. R enantiomer: Senantiomer: Previous (8 Give up new solution 2 Check Answer Next a Exit O VBAD RADX 9 44

Explanation / Answer

Given that (R) isomer specific rotation= - 35.6 degree

Then the (S)- isomer specific rotation= + 35.6 degree

The observed rotation +15.2   degree

Let fraction of R be x, then fraction of S = 1-x

-35.6 X + (+35.6) (1-X) =+15.2

-35.6 X + 35.61- 35.6 X =+15.2

-71.2 X = -20.41

X = 0.287

X = 0.287 or 28.7% is R isomer and 0.713 or 71.3 % is S isomer.

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