A Mixture of Two Enantiomers with a Composition of 65

question 68

Multiple Choice

A mixture of two enantiomers with a composition of 65.0% R has an observed rotation of -25.3° in a polarimeter tube. If the mixture has a concentration of 2.038 g/mL at 25°C, what is the predicted [α]²⁵D of an optically pure sample of the S enantiomer?

• A) -25.3°
• B) -53.5°
• C) +12.4°
• D) +41.3°
• E) +53.5°

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