The specific rotation of (s)-2-butanol is +13.5. if 0.119 g of its enantiomer is dissolved in 10.0 ml of ethanol and placed in a sample cell with a length of 1.00 dm, what observed rotation do you expect?

+15.8°

Explanation:

The formula for the observed rotation (α) of an optically active sample is

α = [α]lc

where

l = the cell path length in decimetres

c = the concentration in units of g/100 mL

[α] = the specific rotation in degrees  

1. Convert the concentration to units of g/100 mL

2. Calculate the observed rotation

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

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