If a solution of a compound (30.0 g/100 mL of solution)has a measured rotation of +15º in a 2.0 dm tube,the specific rotation is:
A)+50
B)+25
C)+15
D)+7.5
E)+4.0

Question

Quizplus · Accepted Answer

The specific rotation $[α]$ is calculated using the formula $[α] = \frac{α}{l \times c}$, where $α$ is the observed rotation (in degrees), $l$ is the length of the tube (in decimeters), and $c$ is the concentration of the solution (in grams per 100 mL). Plugging in the given values: $[α] = \frac{+15}{2.0 \times 0.3} = +25$.

If a Solution of a Compound (30