Measure Rotation of D-Glucose

D-Glucose would be expected to be optically active since it contains 4 asymmetric centers and is obtained from natural sources that produce chiral materials.

The magnitude of the observed optical rotation of a chiral substance can be used as a measure of its optical purity.

Therefore, let's measure the roations of the sample of D-glucose crystallized from water and the sample crystallized from aqueous acetic acid to see how they compare.