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A solution of 0.1 g/mL of a pure R enantiomer in a 1.0 dm (i.e., 10 cm) polarimeter rotates plane polarized light by +4.8°. What is the rotation observed on this solution in a 2 dm polarimeter?

A solution of 0.1 g/mL of a pure R enantiomer in a 1.0 dm (i.e., 10 cm) polarimeter rotates plane polarized light by +4.8°. What is the rotation observed on this solution in a 2 dm polarimeter? Correct Answer +9.6°

The specific optical rotation of a sample, , is calculated using the equation = α/cl, where α is the observed rotation, c is the concentration (in g/mL), and l is the pathlength (in dm). is a constant for a sample.

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