Question

A sample of carvone was found to be 39% optically pure in favor of the dextrorotatory
enantiomer. The specific rotation for enantiomerically pure carvone is 61o. The polarimetry
experiment that led to this result was performed utilizing a 2.5 dm polarimeter tube and a
solution that was prepared by dissolving 3.49 g of carvone in 55 mL of ethanol. What was the
observed rotation for this experiment?

Answer 1

23.78