When 1 g of compound X is dissolved in 100 mL of solvent the

When 1 g of compound X is dissolved in 100 mL of solvent, the observed rotation is +12. What will be the observed rotation if 1 g of compound X is dissolved in 200 mL of solvent?

Solution

[] x C x l = []_observed

[] = observed rotation

[]_observed = specific rotation

C = Concentration

l = Path Length in cm

From this we can understand observed rotation and concentration will be directly propotinal.

Observed rotation if 1 g of compound X is dissolved in 200 mL of solvent = +12 / 2 = +6