Specific Rotation Calculator







Formula

The formula to calculate the specific rotation is:

\[ \text{SR} = \frac{a}{y \times l} \]

Where:

What is Specific Rotation?

Specific rotation is defined as "the change in orientation of monochromatic plane-polarized light, per unit distance-concentration product, as the light passes through the sample of a compound in solution."

Example Problem

Let's assume the following:

Step 1: Calculate the specific rotation:

\[ \text{SR} = \frac{25}{0.5 \times 1} = \frac{25}{0.5} = 50 \text{ deg*mL/(g*dm)} \]

Therefore, the specific rotation is 50 deg*mL/(g*dm).