Pure (S)-2 -butanol has a specific rotation o | vedclass

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$(c)$ Optical purity $= \frac{Optical\, rotation \,of \,mixture}{Optical\, rotation \,of\, pure\, compound} 	imes 100 ;$  $O.P. = \frac{6.76}{13

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$50\,\% \,(S), 50\,\%$ racemic

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$(c)$ Optical purity $= \frac{Optical\, rotation \,of \,mixture}{Optical\, rotation \,of\, pure\, compound} 	imes 100 ;$  $O.P. = \frac{6.76}{13.52} 	imes 100$

Pure $(S)-2$ -butanol has a specific rotation of $+ 13.52$ degrees. A sample of $2$ -butanol prepared in the lab and purified by distillation has a calculated specific rotation of $+6.76$ degrees. What can you conclude about the composition ?

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